JPS6251541B2 - - Google Patents
Info
- Publication number
- JPS6251541B2 JPS6251541B2 JP3283880A JP3283880A JPS6251541B2 JP S6251541 B2 JPS6251541 B2 JP S6251541B2 JP 3283880 A JP3283880 A JP 3283880A JP 3283880 A JP3283880 A JP 3283880A JP S6251541 B2 JPS6251541 B2 JP S6251541B2
- Authority
- JP
- Japan
- Prior art keywords
- adaptive
- value
- prediction means
- prediction
- gain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003044 adaptive effect Effects 0.000 claims description 105
- 238000013139 quantization Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 32
- 238000012937 correction Methods 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000005311 autocorrelation function Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/04—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM]
- H03M3/042—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM] with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283880A JPS56129443A (en) | 1980-03-14 | 1980-03-14 | Adaptive type differential pcm system and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283880A JPS56129443A (en) | 1980-03-14 | 1980-03-14 | Adaptive type differential pcm system and its device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56129443A JPS56129443A (en) | 1981-10-09 |
| JPS6251541B2 true JPS6251541B2 (fr) | 1987-10-30 |
Family
ID=12369956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3283880A Granted JPS56129443A (en) | 1980-03-14 | 1980-03-14 | Adaptive type differential pcm system and its device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56129443A (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437087A (en) * | 1982-01-27 | 1984-03-13 | Bell Telephone Laboratories, Incorporated | Adaptive differential PCM coding |
| CA1288867C (fr) * | 1985-06-20 | 1991-09-10 | Tomoyoshi Takebayashi | Systeme de modulation differentielle adaptative par impulsions et codage |
| JP2562659B2 (ja) * | 1988-04-20 | 1996-12-11 | 三洋電機株式会社 | Ａｄｐｃｍ信号の復号装置 |
-
1980
- 1980-03-14 JP JP3283880A patent/JPS56129443A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56129443A (en) | 1981-10-09 |
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