Apparatus for recording additional video signals in a helical scan operation

• US 4,575,772 A
• Filed: 03/24/1983
• Issued: 03/11/1986
• Est. Priority Date: 03/25/1982
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Nakano, Kenji, Moriwaki, Hisayoshi, Takahashi, Takao, Shimada, Keiichiro
• Primary Examiner(s): Cardillo, Raymond F.
• Assistant Examiner(s): Weinhardt, Robert A.
• Application Number:
  US06/478,491
• Time in Patent Office: 1,083 Days
• Field of Search: 358/341, 358/343, 358/323, 358/335, 360/19.1, 360/9.1, 360/11.1, 360/27, 360/18, 360/33.1, 369/48, 369/49
• US Class Current: 386/244
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/032 on tapes G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: H04N 5/9268 with insertion of the PCM audio signals in the vertical blanking interval of the PCM video signal
• CPC Class Codes: H04N 5/928 the sound signal being pulse code modulated and recorded in time division multiplex with the modulated video signal

Abstract

A video signal recording apparatus of the type that records a coded audio signal through time division relative to a video signal at one extended end of each of oblique tracks formed on a magnetic tape by helical scanning. The apparatus comprises a circuit for recording a coded video signal in the track region where a coded audio signal is recorded, and a circuit for recording identification data to discriminate between the coded audio signal and the coded video signal on the magnetic tape or recording control data thereon to control playback modes of the recorded signals.

Claims

1. Apparatus for recording additional video signals on a magnetic record medium having video and audio signals recorded thereon in oblique tracks by helical scanning, in which the recorded audio signals are arranged at an extended end of each of said oblique tracks, said apparatus comprising:

random access memory means for storing said additional video signals;

means for selectively reading out said additional video signals stored in said random access memory means;

recording means for recording said additional video signals selectively read out from said random access memory means on said magnetic record medium; and

control means for controlling said recording means to record said additional video signals in positional correspondence with selected ones of said audio signals recorded at said extended ends of said tracks, whereby said additional video signals are recorded in place of said selected ones of said audio signals.

2. Apparatus according to claim 1, further comprising means for generating identification code signals fed to said recording means for recording on said magnetic record medium, whereby the signals recorded at said extended ends of said oblique tracks are identified.

3. Apparatus according to claim 1, wherein said additional video signals are still video signals.

4. Apparatus according to claim 1, wherein said additional video signals are character video signals.

5. Apparatus according to claim 1, in which said control means includes change-over switch means connected to said additional video signals stored in said random access memory means for selectively connecting said additional video signals to said recording means including magnetic recording heads for helically scanning said magnetic record medium.

6. Apparatus according to claim 5, in which said control means further includes timing generator means for controlling the operation of said change-over switch means for recording said additional video signals in positional correspondence with selected ones of said audio signals.

7. Apparatus according to claim 5, further comprising means connected to said change-over switch means for reproducing said recorded video and audio signals and said additional video signals from said magnetic record medium.

8. Apparatus for recording additional video signals onto a record medium on which there have been recorded video and audio signals in parallel oblique tracks by helical scanning, said apparatus comprising:

memory means connected to store additional video signals;

change-over means connected to additional video signals from said memory means for recording said additional video signals in said oblique tracks on said record medium;

control means connected to said memory means and to said change-over means for causing said additional video signals to be read out from said memory means to said change-over means;

identification signal generating means producing a coded identification signal identifying said additional video signals fed to said change-over means for recording on said record medium; and

timing means connected to control said change-over means for recording said additional video signals and said coded identification signal on said record medium, whereby said additional video signals are recorded in said oblique tracks in positional correspondence with selected ones of said audio signals.

9. Apparatus according to claim 8, in which reproducing circuit means are connected to said change-over means for reproducing said recorded video and audio signals and said additional video signals from said recorded medium.

10. Apparatus according to claim 8, wherein said additional video signals are still video signals.

11. Apparatus according to claim 8, wherein said additional video signals are character video signals.