METHOD AND APPARATUS OF RECORDING/REPRODUCING MULTI-CHANNEL STREAM

• US 20080152304A1
• Filed: 03/13/2008
• Published: 06/26/2008
• Est. Priority Date: 07/07/2001
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Um, Soung Hyun, Yoo, Jea Yong, Kim, Byung Jin, Seo, Kang Soo
• Application Number:
  US12/047,667
• Publication Number:
  US 20080152304A1
• Time in Patent Office: Days
• US Class Current: 386/92
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 27/3036 Time code signal
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/4263 involving specific tuning arrangements, e.g. two tuners
• CPC Class Codes: H04N 21/4305 Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4344 Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 7/0122 the input and the output signals having different aspect ratios
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

The present invention relates to multi-channel stream recording/reproducing method and apparatus. The present multi-channel stream reproducing method checks whether or not reproduced multi-channel stream belongs to same broadcast (RF) channel, and deletes PSI (Program Specific Information) packets included in channel stream excluding one channel stream if it belongs to same RF channel, and makes new PSI packets with reference to PSI packets included in reproduced multi-channel stream to replace them, if not. Furthermore, the present method compensates appropriately PCRs (Program Clock References) included in channel stream excluding one channel stream in case of the latter. The present method enables a digital TV set to present multi-channel stream simultaneously in PIP (Picture-In-Picture) or multi-screen mode with no error in channel selection and presentation (or decoding) time.

Claims

1-24. -24. (canceled)

25. A method of reproducing video data recorded in a recording medium, comprising:

reading navigation information from the recording medium, the navigation information comprising information indicating a presence of a video stream for displaying a PIP (Picture-In-Picture); and

reproducing a first video stream and the video stream for displaying a PIP simultaneously based on the navigation information.

26. The method of claim 25, wherein the first video stream and the video stream for displaying a PIP are separate.

27. The method of claim 25, further comprising reproducing the video stream for displaying a PIP when the navigation information indicates the presence of the video stream for displaying the PIP.

28. The method of claim 25, wherein the first video stream and the video stream for displaying a PIP are reproduced in a single stream object.

29. The method of claim 28, wherein the navigation information comprises navigation data for the single stream object.

30. The method of claim 25, wherein the first video stream and the video stream for displaying a PIP are reproduced separately in two different stream objects.

31. The method of claim 30, wherein the navigation information comprises navigation data for each of the two different stream objects.

32. A method of recording video data on a recording medium, comprising:

recording a first video stream and a second video stream on the recording medium, the second video stream for displaying a PIP (Picture-In-Picture); and

recording navigation information on the recording medium, the navigation information comprising information indicating the presence of the second video stream.

33. The method of claim 32, wherein the first video stream and the second video stream are recorded separately.

34. The method of claim 32, wherein the first video stream and the second video stream are reproduced in a single stream object.

35. The method of claim 34, wherein the navigation information comprises navigation data associated with the single stream object.

36. The method of claim 32, wherein the first video stream and the second video stream are recorded separately in two different stream objects.

37. The method of claim 36, wherein the navigation information comprises navigation data for each of the two different stream objects.

38. A recording medium, the recording medium comprising:

a first video stream and a second video stream, the second video stream for displaying a PIP (Picture-In-Picture); and

navigation information comprising information indicating the presence of the second video stream.

39. The recording medium of claim 38, wherein the first video stream and the second video stream are stored in a single stream object.

40. The recording medium of claim 38, wherein the navigation data comprises navigation data associated with the single stream object.

41. The recording medium of claim 40, wherein the first video stream and the second video stream are stored separately in two different stream objects.

42. The recording medium of claim 41, wherein the navigation information comprises navigation data for each of the two different stream objects.

43. An apparatus for reproducing video data recorded in a recording medium, the apparatus comprising:

a reproducing unit for reproducing data from the recording medium; and

a controller for controlling the reproducing unit to read navigation information from the recording medium, and controlling the reproducing unit to reproduce a first video stream and a video stream for displaying a PIP (Picture-In-Picture) simultaneously based on the navigation information,

wherein the navigation information comprises information indicating a presence of the video stream for displaying the PIP.

44. The apparatus of claim 43, wherein the controller further controls the reproducing unit to reproduce the video stream for displaying a PIP when the navigation information indicates the presence of the video stream for displaying the PIP.

45. The apparatus of claim 43, wherein the reproducing unit further reads a single stream object from the recording medium, the single stream objecting comprising the first video stream and the video stream for displaying the PIP.

46. The apparatus of claim 45, wherein the controller further controls the reproducing unit to reproduce the single stream object based on navigation data for the single stream object.

47. The apparatus of claim 43, wherein the reproducing unit further reads two stream objects from the recording medium, wherein one of the two stream objects comprises the first video stream and the second of the two stream objects comprises the video stream for displaying the PIP.

48. The apparatus of claim 47, wherein the controller further controls the reproducing unit to reproduce the two stream objects based on navigation data for each of the two stream objects.

49. An apparatus for recording video data on a recording medium, the apparatus comprising:

a recording unit for recording data on the recording medium;

a controller for controlling the recording unit to record a first video stream and a second video stream for displaying a PIP (Picture-In-Picture) on the recording medium and controlling the recording unit to record navigation information on the recording medium, the navigation information comprising information indicating the presence of the second video stream.

52. The apparatus of claim 49, wherein the recording unit further records the first video stream and the second video stream separately as two different stream objects.

53. The apparatus of claim 52, wherein the controller further controls the recording unit to record navigation data for each of the two different stream objects in the recording medium.

51. The apparatus of claim 50, wherein the controller further controls the recording unit to record navigation data associated with the single stream object in the recording medium.