Patent EP0527611A2 successfully refreshed from Google Patents.
EP0527611A2
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EP
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Digital video signal recording apparatus
Assignee: Sony Corp
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Filing: 1992-08-07
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Granted: —
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Expires: 2012-08-07
Abstract
Abstract Coefficient data generated in a DCT transform circuit (2Y, 2C) is sent to a shuffling circuit (3Y, 3C). The shuffling circuit shuffles the data in one field. The amount of coefficient data generated block by block is equalized by the shuffling process. A buffering circuit (6) forms sync blocks with a fixed length by using coefficient data. A DC component of coefficient data is followed by low order components, following by high order components. The blocks of coefficient data are sent to the buffering circuit in this sequence. The buffering circuit performs control operations such as moving bits of high order coefficient data to other sync blocks.
Inventors
- 👤 Yoshihiro Murakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:36
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N5/00; H04N5/76; H04N19/00; H04N19/10; H04N19/102; H04N19/124; H04N19/134; H04N19/146; H04N19/152; H04N19/169; H04N19/17; H04N19/176; H04N19/18; H04N19/60; H04N19/85; H04N19/88; H04N21/40; H04N21/43; H04N21/434; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/78266; H04N9/797; H04N9/7973
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A digital video signal recording apparatus for dividing input digital video signal into blocks of plurality of picture element data, for transform encoding said digital video signal into coefficient data block by block, for recording said coefficient data on a magnetic tape using a plurality of magnetic heads disposed on a rotating drum, said apparatus comprising: means for arranging said coefficient data in the sequence from a low order to a high order and for outputting the arranged coefficient data; variable length encoding means for receiving the arranged coefficient data and for encoding said coefficient data into variable length code; and sync block length controlling means, coupled with said variable length encoding means, for moving the last portion of coefficient data of said each block so as to keep the length of each sync block constant.
Claim 2
Dependent Claim
39 words
The digital video signal recording apparatus as set forth in claim 1, wherein said variable length encoding means is adapted to perform the variable length encoding process for coefficient data other than DC coefficient data of said coefficient data.
Claim 3
Dependent Claim
43 words
The digital video signal recording apparatus as set forth in claim 1, wherein said sync block length controlling adapted to move high order coefficient data of an output said variable length encoding means so as to keep the length said sync block constant.
Claim 4
Dependent Claim
144 words
A digital video signal recording apparatus for dividing an input digital video signal into blocks of plurality picture element data, for transform encoding said digital video signal into coefficient data block by block, and for recording said coefficient data on a magnetic tape by using a plurality of magnetic heads disposed on a rotating drum, said apparatus comprising: shuffling means for shuffling a predetermined amount of coefficient data, for arranging the shuffled coefficient data in sequence from a low order to a high order, and for outputting the arranged coefficient data; variable length encoding means, coupled with said shuffling means, for encoding said coefficient data into variable length code; and sync block length controlling means, coupled with said variable length encoding means, for moving the last portion of coefficient data of each block so as to keep the length of each sync block constant.
Claim 5
Dependent Claim
33 words
The digital video signal recording apparatus as set forth in claim 4, wherein said shuffling means is adapted to shuffle said coefficient data at least in said block according to a predetermined rule.
Claim 6
Dependent Claim
39 words
The digital video signal recording apparatus as set forth in claim 4, wherein said variable length encoding means is adapted to perform the variable length encoding process for coefficient data other then DC coefficient data of said coefficient data.
Claim 7
Dependent Claim
47 words
The digital video signal recording apparatus as set forth in claim 4, wherein said sync block length controlling means is adapted to move high order coefficient data of an output of said variable length encoding means so as to keep the length of said sync block constant.
References Cited (Backward Citations)
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