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US5602549A
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System for variable length decoding digital transmission data which has been compressed by selecting a scanning pattern
Assignee: Samsung Electronics Co Ltd
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Filing: 1995-09-22
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Granted: 1997-02-11
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Expires: 2015-09-22
Abstract
Abstract A system for variable-length-coding and variable-length-decoding digital data divided into a block unit of a predetermined size which includes variable-length-coding each block data according to various scanning patterns, accumulating the various lengths of variable-length-coded data, selecting a scanning pattern corresponding to a minimum accumulated length, transmitting the variable-length-coded data according to the selected scanning pattern and scanning the transmitted data according to the same scanning pattern as applied to variable-length-coding process, thereby the scanned data being variable-length-decoded. As a result, data compression can be improved efficiently by means of utilizing an optimized scanning pattern for variable-length-coding and variable-length-decoding of the block data.
Inventors
- 👤 Jechang Jeong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:46
CPC Classifications
H; H04; H04N; H04N19/00; H03; H03M; H03M7/00; H04N19/10; H04N19/102; H04N19/129; H04N19/134; H04N19/146; H04N19/15; H04N19/169; H04N19/17; H04N19/176; H04N19/60; H04N19/61; H04N19/13; H04N19/70; H04N19/90; H04N19/91
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
67 words
A decoding apparatus, comprising: means for converting variable-length-coded data into symbol data; means for outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; a run level decoder responsive to said means for converting and said means for outputting, whereby said run level decoder transforms said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 2
Dependent Claim
67 words
A decoding apparatus, comprising: means for converting variable-length-coded data into symbol data; means for outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; a run level decoder responsive to said means for converting and said means for outputting, whereby said run level decoder transforms said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 3
Dependent Claim
50 words
A decoding apparatus as recited in claim 1, wherein said means for outputting a plurality of scan addresses comprises: a storage area for storing a plurality of scanning patterns; and means for selecting the specific scanning pattern among the plurality of scanning patterns in response to said scanning pattern data.
Claim 4
Dependent Claim
20 words
A decoding apparatus as recited in claim 2, wherein each of said scanning patterns contains a plurality of scan addresses.
Claim 5
Dependent Claim
28 words
A decoding apparatus as recited in claim 1, further comprising a dequantization means for receiving the quantization coefficients from said run level decoder and dequantizing said quantization coefficients.
Claim 6
Dependent Claim
23 words
A decoding apparatus as recited in claim 1, wherein said scanning pattern data indicates either a zigzag scanning pattern or another scanning pattern.
Claim 7
Dependent Claim
18 words
A decoding apparatus as recited in claim 5, wherein said another scanning pattern is an alternate scanning pattern.
Claim 8
Dependent Claim
30 words
A decoding apparatus as recited in claim 1, wherein said means for outputting a plurality of scanning addresses comprises means for storing a zigzag scanning pattern and another scanning pattern.
Claim 9
Dependent Claim
18 words
A decoding apparatus as recited in claim 7, wherein said another scanning pattern is an alternate scanning pattern.
Claim 10
Dependent Claim
69 words
A decoding apparatus, comprising: a variable-length-decoder for converting variable-length-coded data into symbol data; a scanning pattern selector for outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; a run level decoder responsive to said variable-length-decoder and said scanning pattern selector, whereby said run level decoder transforms said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 11
Dependent Claim
69 words
A decoding apparatus, comprising: a variable-length-decoder for converting variable-length-coded data into symbol data; a scanning pattern selector for outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; a run level decoder responsive to said variable-length-decoder and said scanning pattern selector, whereby said run level decoder transforms said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 12
Dependent Claim
45 words
A decoding apparatus as recited in claim 9, wherein said scanning pattern selector comprises: a storage area for storing a plurality of scanning patterns; and means for selecting the specific scanning pattern among a plurality of scanning patterns in response to said scanning pattern data.
Claim 13
Dependent Claim
20 words
A decoding apparatus as recited in claim 10, wherein each of said scanning patterns contains a plurality of scan addresses.
Claim 14
Dependent Claim
28 words
A decoding apparatus as recited in claim 9, further comprising a dequantizer for receiving the quantization coefficients from said run level decoder and dequantizing the received quantization coefficients.
Claim 15
Dependent Claim
23 words
A decoding apparatus as recited in claim 9, wherein said scanning pattern data indicates either a zigzag scanning pattern or another scanning pattern.
Claim 16
Dependent Claim
18 words
A decoding apparatus as recited in claim 13, wherein said another scanning pattern is an alternate scanning pattern.
Claim 17
Dependent Claim
30 words
A decoding apparatus as recited in claim 9, wherein said means for outputting a plurality of scanning addresses comprises means for storing a zigzag scanning pattern and another scanning pattern.
Claim 18
Dependent Claim
18 words
A decoding apparatus as recited in claim 15, wherein said another scanning pattern is an alternate scanning pattern.
Claim 19
Independent Claim
50 words
A method of decoding data, said method comprising the steps of: converting variable-length-coded data into symbol data; outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; transforming said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 20
Independent Claim
50 words
A method of decoding data, said method comprising the steps of: converting variable-length-coded data into symbol data; outputting a plurality of scan addresses according to a specific scanning pattern in response to scanning pattern data; transforming said symbol data into quantization coefficients in response to said plurality of scan addresses.
Claim 21
Dependent Claim
20 words
The method of decoding data according to claim 17, wherein said transforming step is accomplished using a run level decoder.
Claim 22
Dependent Claim
36 words
The method of decoding data according to claim 18, wherein said outputting step further comprises the step of: selecting the specific scanning pattern among the plurality of scanning patterns in response to said scanning pattern data.
Claim 23
Dependent Claim
21 words
The method of decoding data according to claim 19, wherein each of said scanning patterns contains a plurality of scan addresses.
Claim 24
Dependent Claim
23 words
The method of decoding data according to claim 19, further comprising the step of dequantizing the quantization coefficients produced in the transforming step.
Claim 25
Dependent Claim
24 words
The method of decoding data according to claim 17, wherein said scanning pattern data indicates either a zigzag scanning pattern or another scanning pattern.
Claim 26
Dependent Claim
19 words
The method of decoding data according to claim 22, wherein said another scanning pattern is an alternate scanning pattern.
Claim 27
Dependent Claim
29 words
The method of decoding data according to claim 17, wherein said outputting step comprises selecting said specific data from either of a zigzag scanning pattern or another scanning pattern.
Claim 28
Dependent Claim
19 words
The method of decoding data according to claim 24, wherein said another scanning pattern is an alternate scanning pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-11 | 2000-08-12 | 2001-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-11 | 2004-08-12 | 2005-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-11 | 2008-08-12 | 2009-02-11 | $7700.00 | Window Closed / Lapsed |