Video signal recording apparatus with rerecording inhibit circuit

• US 5,510,900 A
• Filed: 01/06/1994
• Issued: 04/23/1996
• Est. Priority Date: 07/29/1991
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Shirochi, Yoshiki, Yamashita, Keitaro
• Primary Examiner(s): Tran, Thai Q.
• Application Number:
  US08/178,467
• Time in Patent Office: 838 Days
• Field of Search: 358/335, 358/310, 358/906, 360/60, 360/33.1, 360/35.1, 380/5, 380/20, 380/7
• US Class Current: 386/257
• CPC Class Codes: G11B 15/023 remotely controlled
• CPC Class Codes: G11B 15/04 Preventing, inhibiting, or warning against accidental erasing or double recording G11B15/05 takes precedence
• CPC Class Codes: G11B 19/02 Control of operating function, e.g. switching from recording to reproducing
• 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 31/00 Arrangements for the associated working of recording or reproducing apparatus with related apparatus with cameras or projectors G03B31/00 ; recording/reproducing of music for electrophonic musical instruments G10H1/0033; automatic arrangements for answering calls or for recording messages for absent subscribers H04M1/64; telephonic communication systems adapted for combination with dictation recording and playback systems H04M11/10; connection of TV recorder with other related apparatus, e.g. TV camera or receiver, in which the TV signal is significantly involved H04N, e.g. H04N23/00, H04N5/765; combination of radio or TV with other apparatus, e.g. with vehicles H05K11/00
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 7/081 the additional information signals being transmitted by means of a subcarrier

Abstract

A picture signal recording system comprises a high-definition broadcasting station 1, an artificial satellite 2, a television receiver 3 and a video signal recording apparatus 5. A pilot signal P is superimposed on a luminance signal Y at the broadcasting station 1. This pilot signal P does not give any adverse influence to an image reproduced on a TV monitor and is detectable from the luminance signal Y. A frequency of this pilot signal is selected to be smaller than the frequency of the luminance signal Y, a superimposing timing thereof is set to a head position of the luminance signal Y, and an amplitude thereof is varied with respect to a grey level as a variation center. The pilot signal P superimposed on the luminance signal Y is detected by a pilot signal detecting circuit 53 within a video signal recording apparatus 5. The picture signal is recorded on a video tape 11 and rerecording prohibit information is recorded in a reserved area by a picture signal recording process circuit 51. When the video tape 11 on which this rerecording prohibit information has been recorded is reproduced, the reproduced picture signal is prohibited to be rerecorded.

Claims

1. A video signal recording apparatus which inhibits the rerecording of a video signal, comprising:

receiving means for receiving the video signal with a first or a second inhibit recording signal superimposed thereon;

means for producing said second inhibit recording signal in response to reception of said first inhibit recording signal superimposed on said video signal, said second inhibit recording signal being distinguished from said first inhibit recording signal;

means for recording said video signal and for recording said second inhibit recording signal with said video signal when said first inhibit recording signal is received superimposed on said video signal; and

means for inhibiting rerecording of said video signal by said means for recording when said video signal is received with said second inhibit recording signal by said receiving means.

2. The video signal recording apparatus according to claim 1, wherein said receiving means receives said video signal from a broadcast station.

3. The video signal recording apparatus according to claim 1, wherein said receiving means receives said video signal from a video signal reproducing circuit.

4. The video signal recording apparatus according to claim 1, wherein said second inhibit recording signal is recorded at a predetermined reserved portion of the video signal, said predetermined reserved portion being after a synchronizing signal, a burst signal, an identification signal and a ramp signal of the video signal.

5. The video signal recording apparatus according to claim 4, wherein said second inhibit recording signal is a predetermined voltage magnitude representing a logic "1" in said predetermined reserved portion of the video signal.

6. The video signal recording apparatus according to claim 1, wherein said second inhibit recording signal is recorded at a predetermined unused reserved portion of the video signal, said predetermined unused reserved portion being after a synchronizing signal, a burst signal, an identification signal and a ramp signal of the video signal.

7. The video signal recording apparatus according to claim 1, wherein said means for recording includes:

a first detector for detecting said first inhibit recording signal ;

superimposed on said video signal and for supplying a first prohibit control signal when said first inhibit recording signal is detected, and a second detector for detecting said second inhibit recording signal superimposed on said video signal and for supplying a second prohibit control signal when said second inhibit recording signal is detected; and

wherein said means for recording records said second inhibit recording signal with said video signal when said first prohibit control ;

signal is supplied by said first detector, and said means for inhibiting rerecording inhibits rerecording of said video signal by said means for recording when said second prohibit control signal is supplied by said second detector.

8. The video signal recording apparatus according to claim 1, wherein said means for recording is a recorder.