IT1197948B - Codice a lunghezza variabile e dispositivi per trasmissione ad alta frequenza - Google Patents
Codice a lunghezza variabile e dispositivi per trasmissione ad alta frequenzaInfo
- Publication number
- IT1197948B IT1197948B IT22223/86A IT2222386A IT1197948B IT 1197948 B IT1197948 B IT 1197948B IT 22223/86 A IT22223/86 A IT 22223/86A IT 2222386 A IT2222386 A IT 2222386A IT 1197948 B IT1197948 B IT 1197948B
- Authority
- IT
- Italy
- Prior art keywords
- devices
- high frequency
- variable length
- length code
- frequency transmission
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
- H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Communication Control (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT22223/86A IT1197948B (it) | 1986-11-04 | 1986-11-04 | Codice a lunghezza variabile e dispositivi per trasmissione ad alta frequenza |
EP19870115580 EP0279909A3 (en) | 1986-11-04 | 1987-10-23 | Variable lenght code and devices for high frequency transmission |
US07/117,749 US4937573A (en) | 1986-11-04 | 1987-11-04 | Variable length code and devices for high frequency transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT22223/86A IT1197948B (it) | 1986-11-04 | 1986-11-04 | Codice a lunghezza variabile e dispositivi per trasmissione ad alta frequenza |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8622223A0 IT8622223A0 (it) | 1986-11-04 |
IT1197948B true IT1197948B (it) | 1988-12-21 |
Family
ID=11193278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22223/86A IT1197948B (it) | 1986-11-04 | 1986-11-04 | Codice a lunghezza variabile e dispositivi per trasmissione ad alta frequenza |
Country Status (3)
Country | Link |
---|---|
US (1) | US4937573A (it) |
EP (1) | EP0279909A3 (it) |
IT (1) | IT1197948B (it) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9015426D0 (en) * | 1990-07-13 | 1990-08-29 | Indep Broadcasting Authority | Error protection for variable length codestreams |
EP1995963A3 (en) | 1991-04-10 | 2009-06-17 | Mitsubishi Denki Kabushiki Kaisha | Encoder and decoder |
US5227788A (en) * | 1992-03-02 | 1993-07-13 | At&T Bell Laboratories | Method and apparatus for two-component signal compression |
US5517533A (en) * | 1992-03-04 | 1996-05-14 | Digital Equipment Corporation | Parallel implementation of run length coding apparatus and method |
NO175080B (no) * | 1992-03-11 | 1994-05-16 | Teledirektoratets Forskningsav | Fremgangsmåte for koding av bildedata |
US5351047A (en) * | 1992-09-21 | 1994-09-27 | Laboratory Automation, Inc. | Data decoding method and apparatus |
US5343195A (en) * | 1992-12-18 | 1994-08-30 | Thomson Consumer Electronics, Inc. | Variable length codeword decoding apparatus |
US5428611A (en) * | 1993-05-28 | 1995-06-27 | Digital Equipment Corporation | Strong framing protocol for HDLC and other run-length codes |
US5631645A (en) * | 1993-12-29 | 1997-05-20 | Zenith Electronics Corporation | Symbol to byte converter |
US5561422A (en) * | 1994-05-16 | 1996-10-01 | Daewoo Electronics Co., Ltd. | Method and apparatus for variable length coding with reduced memory requirement |
US7272663B2 (en) | 2001-08-28 | 2007-09-18 | International Business Machines Corporation | Method and system for delineating data segments subjected to data compression |
US7212681B1 (en) * | 2003-01-15 | 2007-05-01 | Cisco Technology, Inc. | Extension of two-dimensional variable length coding for image compression |
US7194137B2 (en) * | 2003-05-16 | 2007-03-20 | Cisco Technology, Inc. | Variable length coding method and apparatus for video compression |
US7471840B2 (en) * | 2004-08-18 | 2008-12-30 | Cisco Technology, Inc. | Two-dimensional variable length coding of runs of zero and non-zero transform coefficients for image compression |
US7454073B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Video compression using multiple variable length coding processes for multiple classes of transform coefficient blocks |
US7454076B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Hybrid variable length coding method for low bit rate video coding |
US7471841B2 (en) * | 2004-06-15 | 2008-12-30 | Cisco Technology, Inc. | Adaptive breakpoint for hybrid variable length coding |
US7499596B2 (en) * | 2004-08-18 | 2009-03-03 | Cisco Technology, Inc. | Amplitude coding for clustered transform coefficients |
US7499595B2 (en) * | 2004-08-18 | 2009-03-03 | Cisco Technology, Inc. | Joint amplitude and position coding for photographic image and video coding |
US7492956B2 (en) * | 2004-08-18 | 2009-02-17 | Cisco Technology, Inc. | Video coding using multi-dimensional amplitude coding and 2-D non-zero/zero cluster position coding |
US7620258B2 (en) * | 2004-08-18 | 2009-11-17 | Cisco Technology, Inc. | Extended amplitude coding for clustered transform coefficients |
US7680349B2 (en) | 2004-08-18 | 2010-03-16 | Cisco Technology, Inc. | Variable length coding for clustered transform coefficients in video compression |
US7242328B1 (en) | 2006-02-03 | 2007-07-10 | Cisco Technology, Inc. | Variable length coding for sparse coefficients |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4302775A (en) * | 1978-12-15 | 1981-11-24 | Compression Labs, Inc. | Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback |
US4394774A (en) * | 1978-12-15 | 1983-07-19 | Compression Labs, Inc. | Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback |
US4376933A (en) * | 1979-02-22 | 1983-03-15 | Xerox Corporation | Circuit for compacting data |
CA1211219A (en) * | 1982-06-30 | 1986-09-09 | Hideo Kuroda | Digital data code conversion circuit for variable- word-length data code |
US4568983A (en) * | 1983-12-07 | 1986-02-04 | The Mead Corporation | Image data compression/decompression |
CA1265250A (en) * | 1985-03-04 | 1990-01-30 | Alan Douglas Clark | Data transmission |
-
1986
- 1986-11-04 IT IT22223/86A patent/IT1197948B/it active
-
1987
- 1987-10-23 EP EP19870115580 patent/EP0279909A3/en not_active Withdrawn
- 1987-11-04 US US07/117,749 patent/US4937573A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
IT8622223A0 (it) | 1986-11-04 |
EP0279909A3 (en) | 1992-01-22 |
US4937573A (en) | 1990-06-26 |
EP0279909A2 (en) | 1988-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19971031 |