Digital video data recording apparatus

• US 4,463,387 A
• Filed: 04/16/1981
• Issued: 07/31/1984
• Est. Priority Date: 04/18/1980
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hashimoto, Yoshitaka, Shirota, Norihisa, Yamamoto, Kaichi
• Primary Examiner(s): PSITOS, ARISTOTELIS
• Application Number:
  US06/254,741
• Time in Patent Office: 1,202 Days
• Field of Search: 360/22, 360/32, 360/39, 360/40, 360/33.1, 364/514, 364/515, 358/127, 358/128.6, 358/13, 358/17, 358/310, 358/330, 358/341
• US Class Current: 386/268
• 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 5/9201 involving the multiplexing of an additional signal and the video signal
• CPC Class Codes: H04N 9/802 involving processing of the sound signal H04N9/806, H04N9/835 take precedence
• CPC Class Codes: H04N 9/808 involving pulse code modulation of the composite colour video-signal

Abstract

A digitized video data recording and/or reproducing system comprises a plurality of rotary magnetic heads are disposed on a rotary tape guide drum on the periphery of which a magnetic tape is helically transported at a predetermined wrap angle. A signal processing circuit divides a digitized video signal such that each horizontal scan interval thereof contains a plurality of data blocks, and a signal distributing circuit distributes the blocks of the digitized video data sequentially to the magnetic heads, so that every nth block of each horizontal scan interval is distributed to a respective one of the heads, where n is an even integer. Preferably, there are eight blocks in each horizontal scan interval, and every fourth block is distributed to a respective head.

Claims

1. Digitized video data recording apparatus comprising:

a tape guide drum about the periphery of which a magnetic tape is transported at a predetermined wrap angle;

a plurality of rotary magnetic heads associated with said guide drum for scanning respective parallel slant tracks on said magnetic tape;

means for providing a digitized video signal comprised of horizontal scanning intervals;

signal processing means for arranging the digitized video data of each horizontal scanning interval into a number of data blocks, which number is twice the number of said heads; and

signal distributing means for distributing two blocks of the digitized video data to each of said heads.

2. Digitized video data recording apparatus according to claim 1, wherein said signal processing means arranges said digitized video data of each horizontal scanning interval into eight blocks, and said signal distributing means distributes said blocks of said digitized video data so that every fourth block of each horizontal scanning interval is distributed to a respective one of said heads.

3. Digitized video data recording apparatus according to claim 1, wherein each said block has associated therewith identification data for determining the natural sequence of said blocks, and said apparatus further comprises interchanger means for correcting the order of the reproduced blocks of digitized video data on the basis of said identification data.

4. Digitized video data recording apparatus according to claim 1, further comprising means for adding parity data to each said block prior to recording, and means for correcting errors occurring in the reproduced blocks on the basis of said parity data.

5. Digitized video data recording apparatus according to claim 1, further comprising a further rotary magnetic head disposed on said guide drum for scanning additional slant tracks on said magnetic tape in which digitized audio data are recorded.

6. Digitized video recording apparatus according to claim 1, wherein said plurality of magnetic heads are arranged in line in the direction normal to the scanning direction of said heads.

7. Digitized video recording apparatus according to claim 1, wherein said plurality of magnetic heads are arranged on said guide drum in a staggered fashion such that said slant tracks have ends aligned in the direction of transport of the tape.

8. Digitized video data recording apparatus according to claim 1, wherein said video signal is a color video signal having a color component carried on a color subcarrier, and said means providing a digitized video signal includes quantizing means for quantizing said video signal using a sampling frequency four times the frequency of said color subcarrier.

9. Digitized video data recording apparatus according to claim 1;

wherein said number of heads is four.

10. Digitized video data recording apparatus according to claim 9;

wherein said blocks of said digitized video data to be distributed to two of said heads are processed in one of said channels.

11. Digitized video data recording apparatus according to claim 9;

wherein said blocks are multiplexed sample by sample.