Digital transmitter-receiver

A handset, digital technology, applied in the field of digital handset, can solve problems such as analog signal noise, radio interference, eavesdropping, and lost call information

Inactive Publication Date: 2004-08-04
PANASONIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, the traditional communication system not only needs a large number of parts such as A / D converter, D / A converter and its attached power supply, but also has the possibility of noise in the analog signal, loss of call information, radio interference and eavesdropping. etc. bad situation

Method used

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  • Digital transmitter-receiver
  • Digital transmitter-receiver
  • Digital transmitter-receiver

Examples

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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] figure 1 It is a diagram that cuts away the electro-acoustic conversion part in the digital handset for explaining the first embodiment of the present invention, and shows the configuration of the circuit part and the digital input and output part as a block diagram. In the electro-acoustic conversion part , 21 is the earphone pad for putting the handset against the ear hub of the user, 22 is the sound hole for transmitting the analog sound to the ear hub, and 23 is the analog sound formed by transforming the electrical signal only in the cavity 24 24 is a cavity for generating an analog sound signal and mixing the sound signal to be sent; 25 is a sound guide tube for introducing the voice signal to be sent; 26 1 、26 2 ... 26 n Identical, be a plurality of condenser loudspeakers (sounding body unit, hereinafter referred to as unit A), 27 is a con...

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PUM

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Abstract

An acoustic pulse in size corresponding to the digit position of a digital signal pulse is generated by means of condenser speakers 261, 262,.. 26n, that are grouped electro acoustic transducer elements corresponding to each bit that forms a digital signal employed in a communication channel. Then, an electro acoustic D / A converter for synthesizing the pulse in a cavity 24 is composed. Further, this electro acoustic D / A converter is to be as a component, and an electro acoustic A / D converter is composed by additionally providing electric accessories as in the A / D converter comprising a general electric circuit. In this manner, a transmitter / receiver having a function for converting between an acoustic analog signal and a digital electric signal is composed.

Description

technical field [0001] The present invention relates to general information communication equipment, electro-acoustic equipment, measuring equipment and system input and output processing analog sound signals, and in particular to a digital handset connected to equipment or systems processing digital signals for voice communication. Background technique [0002] Traditionally, when using a communication system that processes digital signals for communication such as voice, on the sending side, the analog voice signal is converted into a digital signal by a microphone and an A / D (analog / digital) converter, and then connected to the communication system. On the receiving side, the received digital signal is converted into an analog signal by a D / A (digital / analog) converter, and an analog converter such as a speaker or earphone is driven to reproduce a voice signal. [0003] Figure 4 In order to show a block diagram of the general structure of a conventional communication sys...

Claims

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Application Information

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IPC IPC(8): H04R25/00H04B1/38H04M1/00H04M1/02H04M1/253H04M1/60H04R1/00H04R1/02
CPCH04R1/005H04R5/04H04M1/6066H04R2201/107H04R5/033H04R19/02
Inventor 安野功修利光平大
Owner PANASONIC CORP
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