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Transmission system with adaptive channel encoder and decoder

A channel coding, transmission system technology, applied in unequal/adaptive error prevention, error detection/prevention using signal quality detectors, etc., can solve problems such as transmission capacity loss

Inactive Publication Date: 2004-03-24
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a loss of useful transmission capacity when the transmission quality is high

Method used

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  • Transmission system with adaptive channel encoder and decoder
  • Transmission system with adaptive channel encoder and decoder
  • Transmission system with adaptive channel encoder and decoder

Examples

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Embodiment Construction

[0018] according to figure 1 The transmission system includes three important units, namely TRAU (Transcoder and Rate Adapter Unit) 2, BTS (Base Transceiver Station) 4, and mobile station 6. TRAU2 is coupled to BTS4 via an A-bis interface 8 . BTS 4 is coupled to mobile station 6 via air interface 10 .

[0019] The speech coder 12 is supplied with the main signal (here speech signal) to be transmitted to the mobile station 6 . A first output of the speech encoder 12 carrying the encoded speech signal (also referred to as source symbols) is coupled to the channel encoder 14 via the A-bis interface 8 . Contains background noise level indicator B D A second output of the speech encoder 12 is coupled to an input of a system controller 16 . Carrying coding characteristics (here the downlink coding rate assignment signal R D ) of the system controller 16 is coupled to the speech encoder 12 and is coupled to the encoding characteristic setting means 25 in the channel encoder 14 a...

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Abstract

A transmission system, includes a transmitter (4) which is coupled with a receiver (6) by a transmission channel (10). The transmitter (4) contains a channel encoder (28), for encoding a source symbol into a encoding symbol. The receiver (6) contains the channel encoder (28), for rebuilding source symbol from the signal received by the transmission channel. According to the invention, the transmitter includes separate encoder for encoding the code characteristic used in a channel encoder (14) and transmitts it to the receiver (6). The receiver (6) is used to receive encoded code characteristic fron a transmission medium, and separate channel encoder (26) is used to code encoded code characteristic. The code characteristic provided by separate channel encoder (26) is tranmitted to a set device (27) of channel encoder (28) to set the code characteristic of channel encoder (28).

Description

technical field [0001] The invention relates to a transmission system comprising a transmitter coupled to a receiver via a transmission channel, wherein the transmitter comprises a channel coder for encoding source symbols into coded symbols, and wherein the receiver comprises a source decoder for encoding symbols according to Reconstructed source symbols are derived from encoded symbols received by the transmission channel, and the transmission system includes encoding characteristic setting means for setting at least one encoding characteristic of the channel encoder and the channel decoder. [0002] The invention also relates to transmitters and receivers used in such transmission systems. The invention also relates to a transmission method. Background technique [0003] Such a transmission system can be used in various applications where the quality of the transmission channel exhibits considerable variation. In order to enable a truly error-free transmission over such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/35H04L1/20
Inventor C・P・M・J・巴根
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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