ES2124664B1 - Metodo y dispositivo de codificacion por modulacion por impulsos codificados diferencial adaptativa. - Google Patents
Metodo y dispositivo de codificacion por modulacion por impulsos codificados diferencial adaptativa.Info
- Publication number
- ES2124664B1 ES2124664B1 ES009602387A ES9602387A ES2124664B1 ES 2124664 B1 ES2124664 B1 ES 2124664B1 ES 009602387 A ES009602387 A ES 009602387A ES 9602387 A ES9602387 A ES 9602387A ES 2124664 B1 ES2124664 B1 ES 2124664B1
- Authority
- ES
- Spain
- Prior art keywords
- adaptive differential
- sample
- coding
- modulation
- signal estimate
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
- H04B14/066—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM]
- H04B14/068—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM] with adaptive feedback
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
Método y dispositivo de codificación por modulación por impulsos codificados diferencial adaptativa. Método de codificación por modulación por impulsos codificados diferencial adaptativa, MICDA, que cumple substancialmente con las Recomendaciones G.726 ó G.727 del CCITT, estando implementado en un codificador MICDA tal que dada una muestra de entrada se obtiene una señal diferencia cuantificada (DQ) sustrayendo de la muestra de entrada un valor estimado de dicha muestra, estimación de señal (SE), tal que se forma un bucle de realimentación que incluye un módulo predictor (27). El módulo predictor (27) calcula, en la trama anterior, la estimación de señal (SE) y una estimación de señal parcial del predictor de sexto orden para la muestra de la trama actual. Por tanto, se paralelizan estas operaciones con otras del algoritmo, acelerándose de modo global la codificación.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES009602387A ES2124664B1 (es) | 1996-11-12 | 1996-11-12 | Metodo y dispositivo de codificacion por modulacion por impulsos codificados diferencial adaptativa. |
| CA002233777A CA2233777A1 (en) | 1996-11-12 | 1998-04-29 | Method and device for adaptive differential pulse code modulation |
| EP98401071A EP0954129A1 (en) | 1996-11-12 | 1998-04-30 | Method and device for adaptive differential pulse code modulation. |
| US09/070,013 US20010043655A1 (en) | 1996-11-12 | 1998-04-30 | Method and device for adaptive differential pulse code modulation |
| JP10159805A JPH11340837A (ja) | 1996-11-12 | 1998-05-01 | 適応差分パルス符号変調方法及び装置 |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES009602387A ES2124664B1 (es) | 1996-11-12 | 1996-11-12 | Metodo y dispositivo de codificacion por modulacion por impulsos codificados diferencial adaptativa. |
| CA002233777A CA2233777A1 (en) | 1996-11-12 | 1998-04-29 | Method and device for adaptive differential pulse code modulation |
| EP98401071A EP0954129A1 (en) | 1996-11-12 | 1998-04-30 | Method and device for adaptive differential pulse code modulation. |
| US09/070,013 US20010043655A1 (en) | 1996-11-12 | 1998-04-30 | Method and device for adaptive differential pulse code modulation |
| JP10159805A JPH11340837A (ja) | 1996-11-12 | 1998-05-01 | 適応差分パルス符号変調方法及び装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2124664A1 ES2124664A1 (es) | 1999-02-01 |
| ES2124664B1 true ES2124664B1 (es) | 1999-11-16 |
Family
ID=31499581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES009602387A Expired - Lifetime ES2124664B1 (es) | 1996-11-12 | 1996-11-12 | Metodo y dispositivo de codificacion por modulacion por impulsos codificados diferencial adaptativa. |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20010043655A1 (es) |
| EP (1) | EP0954129A1 (es) |
| JP (1) | JPH11340837A (es) |
| CA (1) | CA2233777A1 (es) |
| ES (1) | ES2124664B1 (es) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437087A (en) * | 1982-01-27 | 1984-03-13 | Bell Telephone Laboratories, Incorporated | Adaptive differential PCM coding |
| US4516241A (en) * | 1983-07-11 | 1985-05-07 | At&T Bell Laboratories | Bit compression coding with embedded signaling |
| CA1208789A (en) * | 1983-11-25 | 1986-07-29 | Peter E. Chow | Adpcm encoder/decoder with improved tracking |
| JPH0773218B2 (ja) * | 1987-04-21 | 1995-08-02 | 沖電気工業株式会社 | Ａｄｐｃｍ符号化・復号化器 |
| AUPM503794A0 (en) * | 1994-04-13 | 1994-06-09 | Australian National University, The | Adpcm signal encoding/decoding system and method |
-
1996
- 1996-11-12 ES ES009602387A patent/ES2124664B1/es not_active Expired - Lifetime
-
1998
- 1998-04-29 CA CA002233777A patent/CA2233777A1/en not_active Abandoned
- 1998-04-30 EP EP98401071A patent/EP0954129A1/en not_active Withdrawn
- 1998-04-30 US US09/070,013 patent/US20010043655A1/en not_active Abandoned
- 1998-05-01 JP JP10159805A patent/JPH11340837A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0954129A1 (en) | 1999-11-03 |
| US20010043655A1 (en) | 2001-11-22 |
| JPH11340837A (ja) | 1999-12-10 |
| ES2124664A1 (es) | 1999-02-01 |
| CA2233777A1 (en) | 1999-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EC2A | Search report published |
Date of ref document: 19990201 Kind code of ref document: A1 Effective date: 19990201 |
|
| PC2A | Transfer of patent |