Integration of Data and Non-Coded Information on a Transmission Channel Using Byte Interleave Technique
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
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.