2.4G public frequency band digital visual interphone and method to process audio image

A voice processing and walkie-talkie technology, applied in pulse modulated television signal transmission, two-way working system, radio/induction link selection arrangement, etc. The frequency utilization rate of the analog walkie-talkie is not high, so as to achieve the effect of low power consumption, low manufacturing cost and good confidentiality
CN1964471AInactive Publication Date: 2007-05-16NINGBO UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO UNIV
Publication Date
2007-05-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed digital visible walkie-talkie applied 2.4G public frequency band comprises: a power circuit, a speech process circuit with a microphone and loudspeaker and a speech coding / decoding circuit, a video process circuit included a display device and a COMS camera both connected with CPU, a CPU, a RF transmitting-receiving circuit with a 2.4G frequency band transmitting-receiving chip and peripheral circuit to connect with CPU, and an antenna. This invention can transfer both speech and video information simultaneously for high quality multimedia effect with low cost, and fit to spread in large scale.
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Description

technical field

[0001] The invention relates to a wireless walkie-talkie, in particular to a 2.4G public frequency band digital video walkie-talkie and a voice and image processing method. Background technique

[0002] Analog walkie-talkies still occupy a large proportion in the current walkie-talkie market. There are many shortcomings and deficiencies in the existing analog walkie-talkies: First, the analog walkie-talkies transmit analog signals, the signal processing method is simple, the power consumption is large, and the influence of interference and noise cannot be effectively eliminated, resulting in unsatisfactory call quality in many cases. Satisfied; Second, the frequency utilization rate of the analog walkie-talkie is not high, and the channel capacity is low. Third, analog walkie-talkies have poor confidentiality and are easy to be eavesdropped.

[0003] IDEN in the United States and TETRA in Europe have established relevant digital intercom (clustering) standa...

Claims

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