Video signal recording apparatus

• US 5,608,531 A
• Filed: 08/16/1994
• Issued: 03/04/1997
• Est. Priority Date: 12/16/1991
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sato, Dai, Honda, Takashi
• Primary Examiner(s): Tran, Thai Q.
• Assistant Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US08/291,280
• Time in Patent Office: 931 Days
• Field of Search: 358/310, 358/335, 358/316, 358/320, 358/323, 358/326, 358/327, 358/324, 348/503, 348/505, 360/36.1, 360/36.2
• US Class Current: 386/204
• CPC Class Codes: H04N 9/797 for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal H04N9/804, H04N9/81, H04N9/82 take precedence
• CPC Class Codes: H04N 9/83 the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal

Abstract

A video signal recording apparatus in which a chroma signal contained in a video signal is down-converted and then recorded on a predetermined recording medium comprises a sampling circuit for processing the chroma signal in an offset sub-sampling fashion, wherein the chroma signal sampled by the sampling circuit is recorded on the recording medium and a burst signal for detecting a phase of the chroma signal is not sub-sampled and then recorded on the recording medium.

Claims

1. A video signal recording apparatus comprising:

sampling means for offset sub-sampling a chroma signal contained in a video signal and for not sub-sampling a burst signal contained in said video signal, and

means for recording the offset sub-sampled chroma signal and the burst signal on a predetermined recording medium.

2. The recording apparatus of claim 1, wherein said sampling means is operative to sub-sample said chroma signal using a phase offset differing by 360°

/n in each of n consecutive fields of said video signal.

3. The recording apparatus of claim 2, wherein n=4.

4. The recording apparatus of claim 2, wherein said sampling means is operative to sub-sample said chroma signal using a sampling frequency of 1/n times a color subcarrier frequency of said video signal.

5. The recording apparatus of claim 1, further comprising means for down-converting the offset sub-sampled chroma signal, and wherein said means for recording is operative to record the down-converted offset sub-sampled chroma signal.