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Integration of Data and Non-Coded Information on a Transmission Channel Using Byte Interleave Technique

IP.com Disclosure Number: IPCOM000040139D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Bouillot, M: AUTHOR [+3]

Abstract

The purpose of data and non-coded information (NCI) integration techniques is to allow transmission over a communication channel of information from an NCI source in a strictly synchronous way without any delay distortion, together with data information, this data information being transmitted only when there is no NCI information to be transmitted. In this environment, the subject proposal applies mainly to non-compressed voice signals, with a very simple activity detector. A conventional voice channel coder-decoder (CODEC), produces 8-bit slots every 125 microseconds, and simple circuitry detects a low signal level for each CODEC slot (e.g., all bits 0, or all bits 0 except the low- order bit,...). It can also apply to digitized images, a no-activity condition corresponding to no coding change for a given part of the image.

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Integration of Data and Non-Coded Information on a Transmission Channel Using Byte Interleave Technique

The purpose of data and non-coded information (NCI) integration techniques is to allow transmission over a communication channel of information from an NCI source in a strictly synchronous way without any delay distortion, together with data information, this data information being transmitted only when there is no NCI information to be transmitted. In this environment, the subject proposal applies mainly to non-compressed voice signals, with a very simple activity detector. A conventional voice channel coder-decoder (CODEC), produces 8-bit slots every 125 microseconds, and simple circuitry detects a low signal level for each CODEC slot (e.g., all bits 0, or all bits 0 except the low- order bit,...). It can also apply to digitized images, a no-activity condition corresponding to no coding change for a given part of the image. NCI activity/no-activity periods can take place at every possible NCI slot (as there is no time-integration on the activity detector). NCI and data periods cannot thus be delimited by means of special patterns, which would induce delays and delay distortions. (Furthermore, such special patterns would not need to be simulated within data and NCI periods.) Thus, an instantaneous delimitation method is needed. The present proposal assumes that 72 kbps bandwidth is available on the transmission channel, for an NCI rate of 64 kbps; a 9th bit is...