US 5,175,631 AGranted

Apparatus for recording and reproducing a digital video signal in the form of order-rearranged and coded data

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsTatsuro Juri, Masakazu Nishino, Hideki Ohtaka, Kouji Matsushita

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Abstract

A video signal digital recording and reproducing apparatus includes: a rearranging section for rearranging a sequence of signals on a rectangular unit by rectangular unit basis formed by sectioning a group of pixel data on a screen of a digital video signal; an encoding section for subjecting the signals in the rectangular units to bit rate reduction; a block forming section for gathering plural number of the coded rectangular units to constitute a block of signals, and a recording the block of signals section for recording on a recording medium. The rearranging section divides the screen into plural regions, takes out the rectangular units by a certain number in order from each region, and carries out rearrangement so that mutually corresponding rectangular units which are contained respectively in adjacent blocks on the recording medium are mutually adjacent on the screen. The recording section is constituted so that the blocks signals are recorded simultaneously in parallel on the recording medium by using plural channels. The rearranging section may have such a constitution that the screen is divided into plural regions and the rectangular units are taken out by a certain number in order from each region, and rearrangement is carried out to that mutually corresponding rectangular units which are contained respectively in adjacent or neighboring blocks to be simultaneously recorded in parallel by the plural channels on the recording section are mutually adjacent on the screen.

Claims5

Dependent claims

A digital video signal recording apparatus comprising:

a formatting means for formatting an input digital video signal into a plurality of sequentially arranged rectangular unit data each being a group of a predetermined number of picture element data constituting an image in a corresponding one of a plurality of equally divided rectangular areas of a display screen;
a rearranging means for dividing the plurality of sequentially arranged rectangular unit data into a plurality of groups each constituting an image in one of a plurality of equally divided regions of the display screen, and for rearranging the plurality of sequentially arranged rectangular unit data into a plurality of blocks of rearranged rectangular unit data such that each block is formed by a plurality of sets of rectangular unit data which sets are respectively taken from the plurality of groups of the rectangular unit data and that each adjacent two blocks contain at corresponding positions therein sets of rectangular unit data constituting images which are adjacent to each other on the display screen;
an encoding means for encoding each of the rearranged rectangular unit data into a rectangular unit code to obtain a plurality of blocks of rectangular unit codes;
a block forming means for forming the plurality blocks of rectangular unit codes respectively into a plurality of fixed length blocks of rectangular unit codes such that each adjacent two fixed length blocks of the plurality of fixed length blocks contain at corresponding positions therein rectangular unit codes corresponding to images in rectangular areas which are adjacent to each other on the display screen;
and
a recording means for recording the plurality of fixed length blocks on a recording medium such that said each adjacent two fixed length blocks are recorded adjacent to each other on the recording medium.

3 more elements

A digital video signal recording and reproducing apparatus comprising:

a formatting means for formatting an input digital video signal into a plurality of sequentially arranged rectangular unit data each being a group of a predetermined number of picture element data constituting an image in a corresponding one of a plurality of equally divided rectangular areas of a display screen;
a rearranging means for dividing the plurality of sequentially arranged rectangular unit data into a plurality of groups each constituting an image in one of a plurality of equally divided regions of the display screen, and for rearranging the plurality of sequentially arranged rectangular unit data into a plurality of blocks of rearranged rectangular unit data such that each block is formed by a plurality of sets of rectangular unit data which sets are respectively taken from the plurality of groups of the rectangular unit data and that each adjacent two blocks contain at corresponding positions therein sets of rectangular unit data constituting images which are adjacent to each other on the display screen;
an encoding means for encoding each of the rearranged rectangular unit data into a rectangular unit code to obtain a plurality of blocks of rectangular unit codes;
a block forming means for forming the plurality blocks of rectangular unit codes respectively into a plurality of fixed length blocks of rectangular unit codes such that each adjacent two fixed length blocks of the plurality of fixed length blocks contain at corresponding positions therein rectangular unit codes corresponding to images in rectangular areas which are adjacent to each other on the display screen;
a recording and reproducing means for recording the plurality of fixed length blocks on a recording medium such that said each adjacent two fixed length blocks are recorded adjacent to each other on the recording medium, and for reproducing the recorded fixed length blocks from the recording medium;
a decoding means for decoding each of reproduced rectangular unit codes to obtain a plurality of reproduced rectangular unit data;
an inverse rearranging means for rearranging the plurality of reproduced rectangular unit data in an inverse order to that of said rearranging means to obtain a plurality of sequentially arranged reproduced rectangular unit data;
and
a deformatting means for deformatting the plurality of sequentially arranged reproduced rectangular unit data into a plurality of sequentially arranged pixel data to thereby obtain a reproduced digital video signal.

6 more elements

Dependencies are inferred from the claim text.