High-speed data coding and decoding device, and data sending system

Abstract

The present invention is involves a High Speed Data encoding apparatus for compressing a sampled data signal having at least one data signal block of samples comprising: means for receiving the at least one data signal block which contains at least one data signal sample having at least one peak amplitude value; calculating means for calculating a respective gain value for each data signal block, the gain value proportional to the peak amplitude value; and selecting means for selecting a uniform quantizer corresponding to the gain value, the uniform quantizer having a plurality of uniformly spaced quantizing level values which are determined from the gain value; €ƒ€ƒ€ƒ wherein the selected uniform quantizer quantizes each data sample of the data signal block, and provides a plurality of compressed data samples.

Description

technical field [0001] The present invention relates to a communication system, in particular to a signal processing technique for compression of high-speed data communication signals to improve transmission performance and increase communication system capacity. Background technique [0002] Various telecommunication systems are known in the art, and current telephone systems utilize various multiplexing techniques to transmit telephone signals of multiple users over a single transmission line, such as wire or fiber optic cable. Most of these "wire" systems use a form of time division multiplexing (TDM) in which multiple channels are sent sequentially at a rate higher than the channel information rate. [0003] Typical telephone multiplexing requires sampling the telephone signal and sending each sample at a frequency much higher than that of the telephone signal. For this purpose, existing systems digitally sample and encode a telephone signal, multiplex and transmit the ...

AI Technical Summary

Problems solved by technology

However, current telephone data signals are typically 9.6Kb / s (high data rate) or higher (ultra-high rate data, such as 14.4Kb / s or 28.8Kb / s or others, higher or lower), while Current compression techniques are not capable of satisfactorily compressing these higher data rates

The compression of these higher data rates, as well as the special multiple encodings of these higher data rates, results in a reduction in the quality of the modem or FAX signal, and the modem or FAX machine will occasionally degrade the data transmission as the signal passes through an RF communication system. rate

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