Apparatus for improved recording of signals having video and audio components

• US 5,218,454 A
• Filed: 03/22/1990
• Issued: 06/08/1993
• Est. Priority Date: 03/28/1989
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yagisawa, Toshihiro, Nagawasa, Kenichi, Shmokoriyama, Makoto, Aoki, Akio, Yamashita, Shinichi, Kashida, Motokazu
• Primary Examiner(s): Richardson, Robert L.
• Application Number:
  US07/498,047
• Time in Patent Office: 1,174 Days
• Field of Search: 358/335, 358/341, 358/343, 358/141, 358/143, 360/19.1, 360/22, 360/23
• US Class Current: 386/357
• CPC Class Codes: H04N 21/2368 Multiplexing of audio and video streams
• 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 5/78266 using more than one track for the recording of one television field or frame, i.e. segmented recording
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 9/8045 using predictive coding
• CPC Class Codes: H04N 9/8066 with insertion of the PCM audio signals in the vertical blanking interval of the PCM video signal
• CPC Class Codes: H04N 9/8244 involving the use of subcodes
• CPC Class Codes: H04N 9/888 for signals recorded by pulse code modulation
• CPC Class Codes: H04N 9/896 using a digital memory with independent write-in and read-out clock generators

Abstract

A signal recording apparatus for recording a TV signal in which an audio signal such as a MUSE signal and a video signal are multiplexed in a time sharing manner in units of a given period of time, is arranged to code these video and audio signals alike, to dispersively allocate a discretely separated audio signal within the video signal, to provide symbols other than the symbols of the audio and video signals within each synchronizing block for the purpose of permitting the use of other video signal recording apparatuses. The arrangement permits simplification and high-quality of the apparatus for recording the signals of this kind and thus contributes to the popularization of the apparatus.

Claims

1. A video signal recording apparatus comprising:

(a) input means for receiving a TV signal in which an amount of video signal occurring in a given period and an audio signal corresponding in amount to the amount of video signal are time-division-multiplexed with each other;

(b) separation means for separating said audio signal form said TV signal;

(c) recording signal forming means for dividing said audio signal separated by said separation means into a plurality of audio data groups and separately disposing each said audio data group within said said video signal to form a recording signal; and

(d) recording means for recording said recording signal on a recording medium by recording on at least one track of said medium within said given period.

2. An apparatus according to claim 1, wherein said recording signal forming means is operative to form a recording signal as a plurality of channels in which said audio data groups are are disposed within said video signal, said recording means including a recording head corresponding to each channel for recording each channel of said recording signal in a separate recording track of said medium.

3. An apparatus according to claim 2, wherein said recording signal forming means is operative to form said recording signal such that each channel of said recording signal includes at least one audio data group within the video signal of the channel.

4. An apparatus according to claim 1, wherein said recording signal is composed of a predetermined number of bits and includes a great number of synchronizing blocks each of which includes bits obtained by digitizing said video signal and said separated audio signal and synchronizing bits, and wherein said recording means is operative to record a great number of said synchronizing blocks in each said recording track.

5. An apparatus according to claim 1, wherein said recording signal is a signal in which bits obtained by digitizing said video signal and bits obtained by digitizing said separated audio signal are time-division-multiplexed with each other.