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Coder-decoder using single simulation to digital transducer and signal processing method

A technology of digital converters and analog signals, applied in the field of codecs, can solve problems such as waste, increased production costs of Codec chips, complex circuit chip area, etc., and achieve the effect of reducing production costs

Active Publication Date: 2007-03-14
VIA TECH INC
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Problems solved by technology

This will cause the analog-to-digital converter to occupy an excessively large area of ​​the Codec chip and increase the production cost of the Codec chip
For example, in a two-channel Codec chip, two analog-to-digital converter modules occupy about 40% of the Codec chip area, resulting in circuit complexity and waste of chip area.

Method used

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  • Coder-decoder using single simulation to digital transducer and signal processing method
  • Coder-decoder using single simulation to digital transducer and signal processing method
  • Coder-decoder using single simulation to digital transducer and signal processing method

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Embodiment Construction

[0030] In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and understandable, the following special examples of preferred embodiments, together with the accompanying drawings, are described in detail as follows:

[0031] The present invention uses multiple access technology in a codec (Codec) that needs to process multiple groups of audio signals or video signals, so as to reduce the number of analog-to-digital converters required in the Codec. Because the present multiple access method has frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA) three kinds, so the present invention also uses these three kinds of methods in Codec respectively, to achieve The goal of using a single analog-to-digital converter to simultaneously process multiple sets of audio signals or video signals is to reduce the area occupied by the analog-to-digital converter on th...

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Abstract

This invention provides one coding and signal process method to operates single mode digital converter and several analogue signals, which comprises the following parts: one multi-catch modulation module to module several analogue signals into one first multiple memory catch signals to load several first analogue signals; one analogue digital converter coupled to the modulation to sample first multiple catch signals for analogue digital conversion to generate one second memory catch signals; multiple memory demodulation module coupled to analogue digital converter.

Description

technical field [0001] The present invention relates to signal processing, and in particular to codecs (coder-decoders, CODECs). Background technique [0002] A codec (coder-decoder, Codec) is a hardware circuit for performing analog to digital conversion (analog to digital conversion, ADC) or digital to analog conversion (digital to analog conversion, DAC). When an analog signal is received by a computer, mobile phone or other device through a microphone or other video signal source such as a video tape or an analog TV, a digital audio signal can be generated by virtue of the analog-to-digital conversion function of the codec samples or video signal samples. In general, the converted digital audio or video samples may be further compressed to reduce the bandwidth used by the audio or video signals. [0003] Multiple access (Multiple Access) technology is currently mainly used in satellite communications and long-distance telecommunications, enabling a communication satell...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12H04N7/24H04M7/00
Inventor 张正治
Owner VIA TECH INC
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