Video recording, transmitting and reproducing apparatus with concurrent recording and transmitting or multiple dubbing of copy protected video signals

• US 5,673,357 A
• Filed: 02/14/1995
• Issued: 09/30/1997
• Est. Priority Date: 02/15/1994
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Shima, Hisato
• Primary Examiner(s): Psitos, Aristotelis M.
• Assistant Examiner(s): Faber, Alan
• Application Number:
  US08/388,499
• Time in Patent Office: 959 Days
• Field of Search: 360/60, 360/15, 360/19.1, 360/37.1, 360/33.1, 360/32, 360/14.1, 360/14.2, 360/27, 380/4, 380/5, 380/20, 380/25, 358/335, 386/94, 386/96, 386/84, 386/57, 386/54, 386/52, 386/46
• US Class Current: 386/231
• CPC Class Codes: H04N 2005/91321 the copy protection signal being a copy protection control signal, e.g. a record inhibit signal
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 9/8047 using transform coding
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A recording and reproducing apparatus records and reproduces video signals which include video information and copy protection information for restricting the number of times the video information may be copied. Original video information is recorded onto a recording medium with updated copy protection information that indicates that the video information has been copied and is also transmitted with the original copy protection information so that more than one copy of the video information may be generated from the original. The transmitted video information is outputted and/or recorded onto a recording medium with the updated copy protection information.

Claims

1. An apparatus for recording and for transmitting digital video signals derived from input video signals, the input video signals including video information and accompanying copy protection information for restricting copying of said video information, said apparatus comprising:

producing means for producing a digital video signal in response to an input video signal;

block forming means for forming blocks of video signals from said digital video signal;

detecting means for detecting said accompanying copy protection information in said input video signal;

first generating means for generating first copy protection signals substantially equal to said detected accompanying copy protection information;

first combining means for combining said blocks of video signals with said first copy protection signals into first combined signals;

interface means for transmitting said first combined signals;

second generating means for generating second copy protection signals as a function of said detected accompanying copy protection information, said second copy protection signals including updated copy protection information indicating that said video information is being copied;

second combining means for combining said blocks of video signals with said second copy protection signals into second combined signals; and

recording means for recording said second combined signals onto a recording medium.

2. The apparatus of claim 1, wherein said input video signal is a composite video signal and said producing means includes analog-to-digital converting means for converting said composite video signal to said digital video signal.

3. The apparatus of claim 1, further comprising data compression means for compressing said digital video signal to form a compressed digital video signal;

quantizing means for quantizing said compressed digital video signal to form a quantized digital video signal; and

variable length coding means for variable length coding said quantized digital video signal to form a variable length coded video signal and for supplying said variable length coded video signal to said block forming means.

4. The apparatus of claim 1, wherein said first generating means forms packs of first accompanying signals including said first copy protection signals and said second generating means forms packs of second accompanying signals including said second copy protection signals, said packs being comprised of item data and succeeding data, said item data determining the arrangement and function of said succeeding data.

5. The apparatus of claim 4, wherein said first combining means combines said blocks of video signals with said packs of said first accompanying signals to form blocks of first combined signals for delivery to said interface means, and said second combining means combines said blocks of video signals with said packs of said second accompanying signals to form blocks of second combined signals for delivery to said recording means.

6. The apparatus of claim 1, further comprising audio input means for inputting an analog audio signal;

means for analog-to-digital converting said analog audio signal to a digital audio signal;

means for interleaving said digital audio signal to form blocks of audio signals; and

means for generating accompanying audio signals; and

wherein said first combining means combines said blocks of audio signals, said accompanying audio signals, said blocks of video signals and said first copy protection signals to form said first combined signals.

7. The apparatus of claim 1, wherein said second combined signals are arranged in a recording format including a subcode recording area for recording subcode data;

and said apparatus further comprises subcode generating means for generating said subcode data which includes location information to identify a location on said recording medium at which the second combined signals are recorded.

8. The apparatus of claim 1, wherein said detecting means includes a microprocessor.

9. The apparatus of claim 1, wherein said detecting means determines, as a function of said copy protection information, whether copying of said video information is permitted;

and said first generating means is operable to generate said first copy protection signals and said first combining means is operable to combine said blocks of video signals with said first copy protection signals into said first combined signals if copying of said video information is permitted.

10. The apparatus of claim 1, wherein said input video signal is a composite video signal and said copy protection information is disposed in a vertical blanking period of said composite video signal.

11. The apparatus of claim 1, wherein each of said copy protection signals includes SCMS code having a copy protect bit and an original bit.

12. The apparatus of claim 1, further comprising packetizing means responsive to said first combining means for arranging said first combined signals into packets;

parity data generating means for determining a respective parity value for each of said packets and for appending said respective parity value to each said packet; and

encoding means for encoding said packet and said appended parity value into coded signals for delivery to said interface means.

13. The apparatus of claim 1, further comprising parity data generating means responsive to said second combining means for determining respective parity values for each of said second combined signals;

and encoding means for encoding said second combined signals and said respective parity values into coded signals for delivery to said recording means.

14. An apparatus for recording digital video signals derived from received video signals, the recorded digital video signals and the received video signals each having a format which includes a video signal area for video information and respective accompanying information having copy protection information for restricting copying of said video information, said apparatus comprising:

video signal decoding means for decoding said received video signals into blocks of video signals and into blocks of first accompanying signals;

accompanying signal decoding means for decoding said blocks of first accompanying signals to detect said copy protection information;

generating means for generating updated copy protection signals as a function of said detected copy protection information, said updated copy protection information indicating that said video information is being copied;

combining means for combining said blocks of video signals with said updated copy protection signals into combined signals; and

recording means for recording said combined signals onto a recording medium.

15. The apparatus of claim 14, wherein said video signal decoding means includes means for serial-to-parallel converting said received video signals into parallel converted video signals;

means for channel decoding said parallel converted video signals to form channel decoded packets of signals;

error detecting means for identifying an error in respective ones of said channel decoded signals;

depacketizing means for recovering respective packets from said channel decoded signals; and

demultiplexing means for separating said depacketized signals into said blocks of video signals and into said blocks of first accompanying signals.

16. The apparatus of claim 14, wherein said generating means includes a microprocessor.

17. The apparatus of claim 14, wherein said generating means determines, as a function of said copy protection information, whether copying of said video information is permitted;

and said generating means is operable to generate said updated copy protection signals and said combining means is operable to combine said blocks of video signals with said updated copy protection signals into said combined signals if copying of said video information is permitted.

18. The apparatus of claim 14, wherein each of said copy protection and updated copy protection signals includes SCMS code having a copy protect bit and an original bit.

19. The apparatus of claim 14, wherein said generating means forms packs of said updated copy protection signals, said packs being comprised of item data and succeeding data, said item data determining the arrangement and function of said succeeding data.

20. The apparatus of claim 19, wherein said combining means combines said blocks of video signals with said packs of said updated copy protection signals to form blocks of combined signals for delivery to said recording means.

21. The apparatus of claim 14, further comprising parity data generating means responsive to said combining means for determining respective parity values for each of said combined signals;

and encoding means for encoding said combined signals and said respective parity values into coded signals for delivery to said recording means.

22. An apparatus for recording digital video signals derived from input video signals, the input video signals including video information and accompanying copy protection information for restricting copying of said video information, the digital video signals being in a recording format which includes a video signal recording area for recording said video information and respective accompanying information, said apparatus comprising:

producing means for producing said digital video signals in response to said input video signals;

block forming means for forming blocks of said digital video signals;

first detecting means for detecting said copy protection information in said input video signal;

first generating means for generating first accompanying signals which includes said detected copy protection information;

first combining means for combining said blocks of video signals with said first accompanying signals into first combined signals;

interface means for transmitting said first combined signals;

receiving means for receiving said first combined signals;

decoding means for decoding said first combined signals into said blocks of video signals and blocks of first accompanying signals;

accompanying signal decoding means for decoding said blocks of first accompanying signals to decode said copy protection information therefrom;

second generating means for generating updated copy protection signals as a function of said decoded copy protection information, said updated copy protection information indicating that said video information is being copied;

second combining means for combining said decoded blocks of video signals with said updated copy protection signals into second combined signals; and

recording means for recording said second combined signals onto a recording medium.

23. The apparatus of claim 22, further comprising third generating means responsive to said first detecting means for generating additional accompanying signals including said updated copy protection information indicating that said video information is being copied;

third combining means for combining the blocks of digital video signals formed by said block forming means with said additional accompanying signals into third combined signals; and

second recording means for recording said third combined signals onto a second recording medium.

24. An apparatus for recording and for transmitting digital video signals derived from input video signals, the input video signals including video information and input copy protection information for restricting copying of said video information, the digital video signals being in a format which includes a video signal area containing said video information and said copy protection information, said apparatus comprising:

producing means for producing said digital video signals in response to said input video signals;

block forming means for forming blocks of said digital video signals;

detecting means for detecting said copy protection information included in said input video signals;

signal generating means for generating updated copy protection signals indicating that said video information is being copied;

combining means for combining said blocks of digital video signals with said updated copy protection signals into combined signals;

header signal generating means for generating header signals which include said copy input protection information, and for appending said combined signals and said header signals to form associated signals;

interface means for transmitting said associated signals; and

recording means for recording said combined signals onto a recording medium.

25. The apparatus of claim 24, wherein said input video signals are composite video signals and said producing means includes analog-to-digital converting means for converting said composite video signals to said digital video signals.

26. The apparatus of claim 24, further comprising data compression means for compressing said digital video signals to form compressed digital video signals;

quantizing means for quantizing said compressed digital video signals; and

variable length coding means for variable length coding said quantized digital video signals and for supplying said variable length coded digital video signals to said block forming means.

27. The apparatus of claim 24, wherein said signal generating means forms packs comprised of item data and succeeding data, said item data determining the arrangement and function of said succeeding data.

28. The apparatus of claim 27, wherein said combining means combines said blocks of digital video signals with said packs to form blocks of video signals for delivery to said interface means and to said recording means.

29. The apparatus of claim 24, wherein said format includes a subcode area for subcode information, and said apparatus further comprises subcode generating means for generating subcode data which includes location information to identify a location on said recording medium at which said digital video signals are recorded, and wherein said combining means is operable to combine said subcode data with said combined signals.

30. The apparatus of claim 24, wherein said detecting means includes a microprocessor.

31. The apparatus of claim 24, wherein said detecting means determines, as a function of said copy protection information, whether copying of said video information is permitted, and said signal generating means is operable to generate said updated copy protection signals and said combining means is operable to combine said blocks of digital video signals with said updated copy protection signals into said combined signals if copying of said video information is permitted.

32. The apparatus of claim 24, wherein said input video signal is a composite video signal and said copy protection information is provided in a vertical blanking period of said composite video signal.

33. The apparatus of claim 24, wherein said updated copy protection signals include, SCMS code having a copy protect bit and an original bit.

34. The apparatus of claim 24, wherein said header signals include SCMS code having a copy protect bit and an original bit.

35. The apparatus of claim 24, further comprising audio input means for inputting an analog audio signal;

means for analog-to-digital converting said analog audio signal to a digital audio signal;

means for interleaving said digital audio signal to form blocks of digital audio signals; and

means for generating accompanying audio signals; and

wherein said combining means is operable to combine said blocks of audio digital signals, said accompanying audio signals, said blocks of digital video signals and the updated copy protection signals to form said first combined signals.

36. The apparatus of claim 35, wherein said header signals include first and second SCMS codes each having a copy protect bit and an original bit, said first SCMS code representing video copy protection information and said second SCMS code representing audio copy protection information.

37. The apparatus of claim 24, further comprising packetizing means responsive to said header signal generating means for arranging said associated signals into packets;

parity data generating means for determining a respective parity value for each of said packets and for appending said respective parity value to each said packet; and

encoding means for encoding said packet and said appended parity value into coded signals for delivery to said interface means.

38. The apparatus of claim 24, further comprising parity data generating means responsive to said combining means for determining respective parity values for each of said combined signals;

and encoding means for encoding said combined signals and said respective parity values into coded signals for delivery to said recording means.

39. An apparatus for recording digital video signals derived from received video signals, the recorded digital video signals and the received video signals each having a format which includes header signals containing input copy protection information and a video signal area for video information and respective accompanying information having copy protection information for restricting copying of said video information, said apparatus comprising:

decoding means for decoding said received video signals into said header signals, blocks of video signals and blocks of first accompanying signals and for detecting the input copy protection information in said header signals;

generating means for generating updated copy protection signals as a function of said detected input copy protection information, said updated copy protection signals indicating that said video information is being copied;

combining means for combining said blocks of video signals with said updated copy protection signals into combined signals; and

recording means for recording said combined signals onto a recording medium.

40. The apparatus of claim 39, wherein said decoding means includes means for serial-to-parallel converting said received video signals into parallel converted video signals;

means for channel decoding said parallel converted video signals; and

error detecting means for identifying an error in respective ones of said channel decoded signals.

41. The apparatus of claim 39, wherein said video signal decoding means includes means for deriving said header signals from said received video signals;

and means for separating said received signals into said blocks of video signals and into said blocks of first accompanying signals.

42. The apparatus of claim 39, wherein said generating means includes a microprocessor.

43. The apparatus of claim 39, wherein said generating means interprets said input copy protection information to determine whether copying of said video information is permitted;

and said generating means is operable to generate said updated copy protection signals and said combining means is operable to combine said blocks of video signals with said updated copy protection signals when copying is permitted.

44. The apparatus of claim 39, wherein said input copy protection information comprises SCMS code having a copy protect bit and an original bit.

45. The apparatus of claim 39, wherein said header signals include SCMS code having a copy protect bit and an original bit.

46. The apparatus of claim 39, wherein said generating means is operable to generate second accompanying signals in the form of packs comprised of item data and succeeding data, said item data determining the arrangement and function of said succeeding data.

47. The apparatus of claim 46, wherein said combining means is operable to combine said blocks of video signals with said packs of said second accompanying signals to form blocks of associated video signals for delivery to said recording means.

48. The apparatus of claim 39, further comprising parity data generating means responsive to said combining means for determining respective parity values for each of said combined signals;

and encoding means for encoding said combined signals and said respective parity values into coded signals for delivery to said recording means.

49. An apparatus for recording digital video signals derived from input video signals, the input video signals including video information and input copy protection information for restricting copying of said video information, the digital video signals having a format which includes a video signal area for said video information and said input copy protection information, said apparatus comprising:

producing means for producing a digital video signal in response to an input video signal;

block forming means for forming blocks of video signals from said digital video signal;

detecting means for detecting said input copy protection information in said input video signal;

first accompanying signal generating means for generating first accompanying signals as a function of said detected input copy protection information;

first combining means for combining said blocks of video signals with said first accompanying signals into first combined signals;

header signal generating means for generating header signals as a function of said detected input copy protection information, said header signals including said input copy protection information, and for appending said first combined signals to said header signals to form appended signals;

interface means for transmitting said appended signals;

receiving means for receiving said appended signals;

decoding means for decoding said received appended signals into said header signals and into said first combined signals and for decoding said header signals into copy protection signals; and

recording means coupled to said decoding means for recording the decoded first combined signals onto a first recording medium.

50. The apparatus of claim 49, further comprising second recording means coupled to said first combining means for recording said first combined signals onto a second recording medium.

51. The apparatus of claim 49, further comprising second accompanying signal generating means responsive to the received decoded copy protection signals for generating updated copy protection information indicating that said video information is being copied;

and second combining means for combining the blocks of received video signals with said updated copy protection information for recording by said recording means.

52. An apparatus for recording digital video signals and for outputting composite video signals, each having a format which includes a video signal area for said video information and respective accompanying information, the latter having accompanying copy protection information for restricting copying of said video information, said apparatus comprising:

decoding means for decoding received digital video signals to generate blocks of video signals and blocks of first accompanying signals;

detecting means for detecting received copy protection information in the decoded blocks of first accompanying signals;

signal generating means for generating updated copy protection signals as a function of said detected received copy protection information, said updated copy protection signals indicating that said video information is being copied;

first combining means for combining the generated blocks of video signals with said updated copy protection signals into combined signals;

recording means for recording said combined signals onto a recording medium;

signal forming means for forming a digital video signal from said generated blocks of video signals;

digital-to-analog converting means for converting said formed digital video signal to an analog composite video signal;

copy protection signal generating means for generating copy protection signals in response to said detected received copy protection information; and

second combining means for combining said generated copy protection signals and said analog composite video signal to form output composite video signals.

53. The apparatus of claim 52, wherein said decoding means includes means for serial-to-parallel converting said received digital video signals into parallel converted video signals;

means for channel decoding said parallel converted video signals;

error detecting means for identifying an error in respective ones of said channel decoded signals;

means for arranging respective packets of said channel decoded signals to form depacketized signals; and

demultiplexing means for separating said depacketized signals into said blocks of video signals and into said blocks of first accompanying signals.

54. The apparatus of claim 52, wherein said signal generating means includes a microprocessor.

55. The apparatus of claim 52, wherein said signal generating means interprets said detected received copy protection information to determine whether copying of said video information is permitted;

and wherein said signal generating means is operable to generate said updated copy protection signals and said first combining means is operable to combine said generated blocks of video signals with said updated copy protection signals where copying is permitted.

56. The apparatus of claim 52, wherein said copy protection information includes SCMS code having a copy protect bit and an original bit.

57. The apparatus of claim 52, wherein said signal generating means forms packs comprised of item data and succeeding data, said item data determining the arrangement and function of said succeeding data.

58. The apparatus of claim 57, wherein said first combining means combines said generated blocks of video signals with said packs for delivery to said recording means.

59. The apparatus of claim 52, further comprising parity data generating means responsive to said first combining means for determining respective parity values for each of said combined signals;

and encoding means for encoding said combined signals and said respective parity values into coded signals for delivery to said recording means.

60. The apparatus of claim 52, wherein said signal forming means includes deframing means for deframing said blocks of video signals;

inverse quantizing means for inverse quantizing said deframed video signals; and

decompressing means for decompressing said inverse quantized video signals for delivery to said digital-to-analog converting means.

61. The apparatus of claim 52, wherein said second combining means is operable to insert said generated copy protection signals into a vertical blanking period of said composite video signal.

62. The apparatus of claim 52, wherein said format further includes an audio area for audio information and respective accompanying audio information having accompanying audio copy protection information for restricting copying of said audio information;

said decoding means further comprises means for decoding received digital signals into blocks of audio signals and blocks of accompanying audio signals;

said signal forming means includes means for de-interleaving said blocks of audio signals to form digital audio signals; and

said digital-to-analog converting means is operable to convert said digital audio signals to an output analog audio signal.

63. An apparatus for recording digital video signals and for outputting composite video signals in response to input video signals including video information and accompanying copy protection information for restricting copying of said video information, said apparatus comprising:

block forming means for forming blocks of digital video signals from said input video signals;

detecting means for detecting said copy protection information in said input video signal;

first accompanying signal generating means for generating first accompanying signals as a function of said detected copy protection information, said first accompanying signals including said copy protection information;

first combining means for combining said blocks of digital video signals with said first accompanying signals into first combined signals;

interface means for transmitting said first combined signals;

receiving means for receiving said first combined signals;

decoding means for decoding said first combined signals into said blocks of video signals and into blocks of first accompanying signals;

accompanying signal decoding means for decoding said blocks of first accompanying signals;

second accompanying signal generating means for generating second accompanying signals as a function of the copy protection information included in the decoded blocks of first accompanying signals, said second accompanying signals including updated copy protection information indicating that said video information is being copied;

second combining means for combining the decoded blocks of video signals with said second accompanying signals into second combined signals;

recording means for recording said second combined signals onto a recording medium;

signal forming means for forming a digital video signal from said decoded blocks of video signals;

digital-to-analog converting means for converting said formed digital video signal to an analog composite video signal;

copy protection signal generating means for generating copy protection signals as a function of the copy protection information included in the decoded blocks of first accompanying signals; and

inserting means for inserting said generated copy protection signals into said composite video signal to form output composite video signals.

64. The apparatus of claim 63, further comprising third accompanying signal generating means responsive to said detecting means for generating third accompanying signals as a function of the detected copy protection information, said third accompanying signals including updated copy protection information indicating that said video information is being copied;

third combining means for combining said blocks of digital video signals with said third accompanying signals into third combined signals; and

second recording means for recording said third combined signals onto a second recording medium.