Patent US6108450A successfully refreshed from Google Patents.
Patent EP0540350A2 successfully refreshed from Google Patents.
EP0540350A2
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EP
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Method and apparatus for variable length coding
Assignee: Sony Corp
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Filing: 1992-10-30
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Granted: —
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Expires: 2012-10-30
Abstract
Abstract Luminance signal coefficient data and chroma signal coefficient data are mixed in a signal string mixing circuit and supplied to a reverse run generating circuit where a run is taken in a reverse direction with respect to the encoding direction. The run is supplied to a variable length encoding circuit for being processed with variable length encoding so that encoding is performed while the relation on the time base between the signals is maintained. Furthermore, a plurality of code tables for luminance and colour signals has been used.
Inventors
- 👤 Hiromi c/o Patent Division Sony Corp. Yoshinari
- 👤 Yoshihiro C/O Patent Division Sony Corp. Murakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:17
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/30; H03M7/46; H04; H04N; H04N11/00; H04N11/04; H04N11/042; H03M7/40; H03M7/42; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/40; H04N21/43; H04N21/434; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9264; H04N7/00; H04N7/24; H04N7/52; H04N7/54; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047; H04N19/00; H04N19/10; H04N19/102; H04N19/13; H04N19/60; H04N19/65; H04N19/90; H04N19/91
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A method for variable length encoding comprising the steps of mixing plural signals on the time base, taking runs for the signals mixed on the time base in a direction opposite to the encoding direction, and performing variable length encoding on the basis of the runs taken out in the reverse direction.
Claim 2
Dependent Claim
62 words
The method as defined in claim 1 wherein the step of taking the run in the reverse direction comprises the substeps of inverting a data array in one of encoding blocks as variable length encoding units, taking runs in a usual direction for the data array inverted signals, and inverting the data array in the block for which the run is taken.
Claim 3
Dependent Claim
66 words
The method as defined in claim 1 wherein the step of taking the run in the usual direction comprises the substeps of combining a size as a data value of encoding data other than 0 and a run length from the encoding data which is the number of continuous 0 data along the encoding direction and sequential finding sets of the size and the run length.
Claim 4
Dependent Claim
30 words
The method as defined in claim 1 wherein said plural signals are independent signals and processed with variable length encoding on the basis of independent code tables for respective signals.
Claim 5
Dependent Claim
56 words
A variable length encoding apparatus comprising signal string mixing means for mixing plural signals on the time base, means for taking runs for the mixed signals in a direction opposite to the encoding direction, and variable length encoding means for performing variable length encoding on the basis of the runs taken out in the reverse direction.
Claim 6
Dependent Claim
60 words
The method as defined in claim 5 wherein said means for taking runs comprise means for inverting a data array in one of encoding blocks as variable length encoding units, means for taking runs in a usual direction for the data array inverted signals, and means for inverting the data array in the block for which the run is taken.
References Cited (Backward Citations)
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