Processing

Please wait...

Settings

Settings

1. WO1996006511 - METHOD OF FACILITATING AN AUDIO SOURCE CHANGE IN A DIGITAL RADIO COMMUNICATION SYSTEM

Publication Number WO/1996/006511
Publication Date 29.02.1996
International Application No. PCT/US1995/009302
International Filing Date 24.07.1995
IPC
G10L 19/12 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
04using predictive techniques
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
12the excitation function being a code excitation, e.g. in code excited linear prediction vocoders
H04H 7/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
HBROADCAST COMMUNICATION
7Studio equipment; Interconnection of studios
H04Q 7/38 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
QSELECTING
7Selecting arrangements to which subscribers are connected via radio links or inductive links
20in which the radio or inductive links are two-way links, e.g. mobile radio systems
38Arrangements for completing call to or from mobile subscriber
CPC
G10L 19/135
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
04using predictive techniques
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
12the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
135Vector sum excited linear prediction [VSELP]
Applicants
  • MOTOROLA INC. [US/US]; 1303 East Algonquin Road Schaumburg, IL 60196, US
Inventors
  • HELM, David; US
  • FELDERMAN, William; US
Agents
  • COFFING, James, A. ; Motorola Inc. Intellectual Property Dept. 1303 East Algonquin Road Schaumburg, IL 60196, US
Priority Data
08/296,19725.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF FACILITATING AN AUDIO SOURCE CHANGE IN A DIGITAL RADIO COMMUNICATION SYSTEM
(FR) PROCEDE POUR FACILITER UN CHANGEMENT DE SOURCE AUDIO DANS UN SYSTEME DE RADIOCOMMUNICATIONS NUMERIQUE
Abstract
(EN)
The present invention encompasses a method of facilitating an audio source change in a digital radio communication system (100). A typical system includes a plurality of audio source units (101-103), a plurality of audio destination units (105, 106), and a switching unit (108) for rendering one of the plurality of audio source units (101-103) operable. Upon receipt (302) of an information-bearing frame from an audio source unit, a frame sequence value is identified (304). The expected frame sequence value is then determined (306), and this value is compared to the identified frame sequence value to determine whether or not the received frame sequence value matches the expected frame sequence value. When the frame sequence values match, it is assumed that the frames were sourced from the same audio source unit (i.e., no source change has occured). When a mismatch is detected, a source change indication is transmitted by the audio destination units to the communication unit (310), thereby facilitating the audio source change.
(FR)
La présente invention concerne un procédé pour faciliter un changement de source audio dans un système de radiocommunications numérique (100). Un système type comporte une pluralité d'unités émetrices audio (101-103), une pluralité d'unités destinataires audio (105, 106), et une unité de commutation (108) pour rendre utilisable l'une de la pluralité d'unités émettrices audio (101-103). Dès réception (302) d'une trame porteuse d'information en provenance d'une unité émettrice audio, une valeur de séquence de trame est identifiée (304). La valeur de séquence de trame théorique est alors déterminée (306), et cette valeur est comparée à la valeur de séquence de trame identifiée pour déterminer si oui ou non la valeur de séquence de trame reçue correspond à la valeur de séquence de trame théorique. Lorsque les valeurs de séquence de trame coïncident, il est supposé que les trames ont été émises par la même unité émettrice audio (c'est-à-dire qu'aucun changement de source n'est intervenu). En cas de détection d'une non-concordance, une indication du changement de source est transmise par les unités destinataires audio à l'unité de communication (310), facilitant ainsi le changement de source audio.
Latest bibliographic data on file with the International Bureau