WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1981003724) INTERPOLATIVE ENCODER FOR SUBSCRIBER LINE AUDIO PROCESSING CIRCUIT APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/003724    International Application No.:    PCT/US1980/000752
Publication Date: 24.12.1981 International Filing Date: 18.06.1980
IPC:
H03H 17/06 (2006.01), H03M 1/34 (2006.01), H04B 14/04 (2006.01)
Applicants:
Inventors:
Priority Data:
US80/00752 18.06.1980 WO
Title (EN) INTERPOLATIVE ENCODER FOR SUBSCRIBER LINE AUDIO PROCESSING CIRCUIT APPARATUS
(FR) CODEUR D"INTERPOLATION POUR UN DISPOSITIF DE CIRCUIT DE TRAITEMENT AUDIO D"UNE LIGNE D"ABONNE
Abstract: front page image
(EN)An interpolative encoder for a subscriber line audio processing circuit including an interpolative analog-to-digital converter as shown in Fig. 9 for converting an input analog signal to a digital signal including a series of multi-bit binary words each consisting of all 0"s or a series of one or more 0"s and a series of one or more 1"s, logic circuitry (150) for converting each multi-bit binary word into a modified binary word having a new binary format consisting of either all 0"s or a single 1 and a plurality of 0"s such that the value of each modified word is equal to the value of the corresponding multi-bit word converted such that the least significant bit thereof is doubled and made equal to the second bit in value, and a digital filter as shown in Fig. 17 for filtering the series of modified words.
(FR)Un codeur d"interpolation pour un circuit de traitement audio d"une ligne d"abonne comprend un convertisseur analogique/numerique d"interpolation permettant de convertir un signal analogique a l"entree en un signal numerique comprenant une serie de mots binaires multibits, chaque mot etant forme d"une serie de zeros ou d"une serie d"un ou plusieurs zeros et d"une serie d"une ou plusieurs unites, des circuits logiques (150) pour convertir chaque mot binaire multibits en un mot binaire modifie possedant un nouveau format binaire forme soit d"une serie de zeros soit d"un unique et d"une pluralite de zeros de sorte que la valeur de chaque mot modifie soit egale a la valeur du mot multibits correspondant de maniere telle que le bit le moins significatif de celui-ci soit double et rendu egal au deuxieme bit en valeur, et un filtre numerique decrit a la figure (17) servant a filtrer les series de mots modifies.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)