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Plate card type echo eliminator

An echo canceller and echo cancellation technology, applied in wired transmission systems, electrical components, transmission systems, etc., can solve the problems of inflexible configuration, poor echo cancellation performance, and a small number of channels supported by a single chip, and achieve good echo cancellation performance. , easy to integrate, simple structure effect

Inactive Publication Date: 2007-10-17
ZHEJIANG UHOPE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two forms have certain effects, but they also have disadvantages: the embedded terminal form is an independent echo cancellation device, so it needs to provide independent power supply and synchronous clock signal, and the configuration is not flexible
The DSP algorithm chip form is realized by DSP chip + echo cancellation algorithm, because the DSP chip runs other algorithms at the same time, such as DTMF (dual tone multi-frequency) transceiver number, conference bridge and voice compression, so that the single chip supports a small number of channels and echo cancellation The performance is worse than that of professional echo cancellation chips

Method used

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  • Plate card type echo eliminator
  • Plate card type echo eliminator
  • Plate card type echo eliminator

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Embodiment Construction

[0038] Accompanying drawing 2 has provided the connection relation of main parts of the present invention. It can be seen from the accompanying drawings that the professional echo cancellation chip includes a first professional echo cancellation chip, a second professional echo cancellation chip, a third professional echo cancellation chip and a fourth professional echo cancellation chip;

[0039] Described PCI bus interface chip 9 is connected to all by chip selection signal line 2-1, waiting signal line 2-2, read and write signal line 2-3, reset signal line 2-4 and 14 address signal lines 2-5 The programmable logic device 8 described above;

[0040] Described PCI bus interface chip 9 is connected to described H.110 bus interface chip 2 by 11 address signal lines 2-6, and described PCI bus interface chip 9 is connected to respectively by 11 address signal lines 2-6 The first professional echo cancellation chip, the second professional echo cancellation chip, the third profes...

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Abstract

A card echo eliminator includes bus interface connectors J1, J2, a H 110 bus interface chip, an EEPROM memory, a programmable logic device and a PCI bus interface chip characterizing in having a hot plug control chip and a professional echo-elimination chip is connected on it which can be divided into four parts.

Description

technical field [0001] The present invention relates to an electronic component related to electric communication technology, more specifically, the present invention relates to a board-type echo canceller applied to electric communication technology. In the International Patent Classification, the invention should be classified into H04 class. Background technique [0002] At present, there are two forms of general-purpose echo cancellers: 1) embedded terminal type, and 2) DSP (digital signal processing) algorithm chip. These two forms have certain effects, but they also have disadvantages: the embedded terminal form is an independent echo cancellation device, so independent power supply and synchronous clock signal need to be provided, and the configuration is not flexible. The DSP algorithm chip form is realized by DSP chip + echo cancellation algorithm, because the DSP chip runs other algorithms at the same time, such as DTMF (dual tone multi-frequency) transceiver numb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/20H04M9/08
Inventor 何顺兰
Owner ZHEJIANG UHOPE COMM TECH