Video signal recording method, video signal reproduction method, video signal recording apparatus, video signal reproducing apparatus, and video signal recording medium

• US 20020146238A1
• Filed: 04/08/2002
• Published: 10/10/2002
• Est. Priority Date: 04/10/2001
• Status: Abandoned Application

• Current Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Sugahara, Takayuki
• Application Number:
  US10/117,060
• Publication Number:
  US 20020146238A1
• Time in Patent Office: Days
• US Class Current: 386/94
• CPC Class Codes: G11B 19/00 Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/00695 said measures preventing that data are read from the recording medium
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/2575 DVD-RAMs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs

Abstract

Contents are divided into a plurality of parts of the contents with a predetermined time interval, thereby to form a plurality of pieces of divided-contents information. For each piece of the divided-contents information, header information is generated which includes a pointer that shows a record starting position, permission flag information relating to watching or erasing of the contents, and password information for obtaining a permission of a decoding or an erasing. The plurality of pieces of divided-contents information and the corresponding plurality of pieces of header information are recorded onto the same recording medium. From this recording medium, it is possible to reproduce or erase the divided-contents information of which reproduction or erasing is permitted by the permission flag information, and the divided-contents information of which reproduction or erasing is prohibited by the permission flag information but for which the password of the contents and a user input password coincide with each other.

Claims

1. A video signal recording method that obtains divided-video information by dividing a supplied encoded video signal into signals of a plurality of time intervals, generates reproduction cell information that includes record starting position information relating to record starting positions of the obtained divided-video information, and records the generated reproduction cell information and the divided-video information, wherein

each piece of the reproduction cell information includes permission flag information that permits a decoding of divided-video information relating to the reproduction cell information, and password information that gives a decoding permission when a decoding is not permitted, and the video signal recording method records the divided-video information and reproduction cell information onto a recording medium.

2. A video signal reproduction method that reproduces video signals from a recording medium that has been recorded with divided-video information obtained by dividing a supplied encoded video signal into signals of a plurality of time intervals, record starting position information relating to record starting positions of the obtained divided-video information, permission flag information that permits a decoding of the divided-video information, and password information that gives a decoding permission when a decoding is not permitted, wherein

the video signal reproduction method regenerates reproduction lists that assign reproduction orders of a plurality of divided pieces of video information, and reproduces the plurality of divided pieces of video information of which reproduction is permitted based on the permission flag information in the order of the reproduction lists and is also permitted based on the password information.

3. A video signal recording apparatus that obtains divided-video information by dividing a supplied encoded video signal into signals of a plurality of time intervals, generates reproduction cell information that includes record starting position information relating to record starting positions of the obtained divided-video information, and records the generated reproduction cell information and the divided-video information, the video signal recording apparatus comprising:

a reproduction cell information generating unit that generates the reproduction cell information including permission flag information that permits a decoding of divided-video information relating to the reproduction cell information, and password information that gives a decoding permission when a decoding is not permitted; and

an information-recording unit that records the reproduction cell information and the divided-video information onto a recording medium that can be accessed at random.

4. A video signal reproducing apparatus that reproduces video signals from a recording medium that has been recorded with divided-video information obtained by dividing a supplied encoded video signal into signals of a plurality of time intervals, record starting position information relating to record starting positions of the obtained divided-video information, permission flag information that permits a decoding of the divided-video information, and password information that gives a decoding permission when a decoding is not permitted, the video signal reproducing apparatus comprising:

a reproduction list generating unit that generates reproduction lists that assign reproduction orders of a plurality of divided pieces of video information; and

an encoded-video signal decoding unit that decodes the plurality of divided pieces of video information, of which reproduction is permitted based on the permission flag information in the order of the reproduction lists generated by the reproduction list generating unit and is also permitted based on the password information.

5. A video signal recording medium onto which reproduction cell information is recorded that includes divided-video information that is a video signal divided into signals of a plurality of time intervals, record starting position information relating to record starting positions of the divided-video information, and record ending position information, wherein

the reproduction cell information includes permission flag information that permits a decoding of divided-video information relating to the reproduction cell information, and password information that gives a decoding permission when a decoding is not permitted.

6. A video signal recording method that generates reproduction cell information that includes record starting position information relating to a record starting position of an encoded video signal that is simultaneously supplied to a plurality of users via a public transmission network, and records the generated reproduction cell information and the encoded video signal, wherein

the reproduction cell information includes permission flag information that permits a decoding of video information relating to the reproduction cell information, and password information that gives a decoding permission when a decoding is not permitted, and the video signal and the reproduction cell information are recorded on a recording medium.

7. A video signal recording method according to claim 6, wherein when the encoded video signal that is supplied via the public transmission network is a signal attached with control information relating to a secondary utilization within a house, the reproduction cell information is recorded by including the control information relating to a secondary utilization into the reproduction cell information.