JPS625378B2 - - Google Patents
Info
- Publication number
- JPS625378B2 JPS625378B2 JP7412379A JP7412379A JPS625378B2 JP S625378 B2 JPS625378 B2 JP S625378B2 JP 7412379 A JP7412379 A JP 7412379A JP 7412379 A JP7412379 A JP 7412379A JP S625378 B2 JPS625378 B2 JP S625378B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- noise
- dpcm
- signal
- input
- 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
- 238000013139 quantization Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 18
- 230000005236 sound signal Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- GADIKQPUNWAMEB-UHFFFAOYSA-N methyl 4-ethyl-6,7-dimethoxy-9H-pyrido[5,4-b]indole-3-carboxylate Chemical compound N1C2=CC(OC)=C(OC)C=C2C2=C1C=NC(C(=O)OC)=C2CC GADIKQPUNWAMEB-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect 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 (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7412379A JPS55166338A (en) | 1979-06-12 | 1979-06-12 | Pcm coding device |
| US06/156,990 US4354273A (en) | 1979-06-12 | 1980-06-09 | ADPCM System for speech or like signals |
| CA000353752A CA1149289A (en) | 1979-06-12 | 1980-06-11 | Adpcm system for speech or like signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7412379A JPS55166338A (en) | 1979-06-12 | 1979-06-12 | Pcm coding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55166338A JPS55166338A (en) | 1980-12-25 |
| JPS625378B2 true JPS625378B2 (enrdf_load_stackoverflow) | 1987-02-04 |
Family
ID=13538105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7412379A Granted JPS55166338A (en) | 1979-06-12 | 1979-06-12 | Pcm coding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55166338A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239841A1 (de) * | 1982-10-27 | 1984-05-03 | Siemens AG, 1000 Berlin und 8000 München | Schneller dpcm-codierer |
-
1979
- 1979-06-12 JP JP7412379A patent/JPS55166338A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55166338A (en) | 1980-12-25 |
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