Method and apparatus for recording or reproducing video data on or from storage media

• US 5,513,011 A
• Filed: 01/25/1994
• Issued: 04/30/1996
• Est. Priority Date: 01/25/1993
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Matsumoto, Mitsujiro, Uchimura, Kiyoshi, Satoh, Kensuke
• Primary Examiner(s): Tran, Thai Q.
• Application Number:
  US08/186,076
• Time in Patent Office: 826 Days
• Field of Search: 358/341, 358/342, 358/343, 358/335, 358/310, 358/322, 360/19.1, 360/32, 360/48, 360/33.1, 369/48, 369/53, 369/58
• US Class Current: 386/337
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: H04N 5/9205 the additional signal being at least another television signal
• CPC Class Codes: H04N 5/926 by pulse code modulation H04N5/919 takes precedence
• CPC Class Codes: H04N 5/9267 using time division multiplex of the PCM audio and PCM video signals

Abstract

A method and apparatus for recording/reproducing video signals on or from storage media. A video signal is divided into k video blocks in a time-axis direction, wherein k is an integer not less than 2, finding a block skip interval s which is an integer satisfying an equation s=(pk+1)/n when p is an integer not less than 1 and n is an integer not less than 2. The k video blocks are interleaved in order of

i= s(j-1)}mod k+

wherein i is an integer satisfying a relation 1≦i≦k and representing a block number of the video signal, and j is an integer satisfying a relation 1≦j≦k and representing an allocation block number on a storage medium (FIGS. 2(A) and 2(B)). And, thus interleaved video blocks are allocated on the storage medium (312).

Claims

1. A video recording and reproducing method comprising steps of:

dividing a video signal into k video blocks in a time-axis direction, wherein k is an integer not less than 2;

finding a block skip interval s which is an integer satisfying an equation s=(pk+1)/n when p is an integer not less than 1 and n is an integer not less than 2;

interleaving said k video blocks in order of

space="preserve" listing-type="equation">i={s(j-1)}mod k+1

wherein i is an integer satisfying a relation 1≦

i≦

k and representing a block number of said video signal, and j is an integer satisfying a relation 1≦

j≦

k and representing an allocation block number on a storage medium; and

allocating thus interleaved video blocks on said storage medium.

2. A video recording and reproducing method in accordance with claim 1, wherein the video blocks recorded on said storage medium are reproduced cyclically in order of said block allocation number j at an n times faster transfer rate than a transmission rate peculiar to said video signal.

3. A video recording and reproducing method in accordance with claim 2, wherein a recording/reproducing head of said storage medium is shifted repeatedly at predetermined cycles in order of said block allocation number j, each cycle comprising steps of:

reading out video blocks having block numbers 1 to (i-1) from said storage medium; and

writing a video block having a block number i onto a predetermined position of said storage medium.

4. A video recording and reproducing method in accordance with claim 2, wherein said video signal contains video information and sound information which are bandwidth compressed.

5. A video recording and reproducing method in accordance with claim 1, further comprising steps of:

generating a video packet for each of said video blocks;

multiplexing said each of said video blocks into an information field of said video packet;

multiplexing block identification data into an overhead portion of said video packet, said block identification data corresponding to the block number i of the video block to be multiplexed in the information field of said video packet; and

recording said video packet onto said storage medium.

6. A video recording and reproducing method in accordance with claim 5, wherein said video packet has a constant length, and an information volume of said video block to be multiplexed in the information field is multiplexed into said overhead portion of said video packet.

7. A video recording and reproducing method in accordance with claim 1, wherein said video signal is allocated with a blank determined by a maximum memory capacity or utilization area of said storage medium.

8. A video recording and reproducing method in accordance with claim 1, wherein said video signal read out from said storage medium in order of the block allocation number j is transmitted via a transmission line.