Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Reexamination Certificate
1999-02-16
2001-03-13
Dorvil, Richemond (Department: 2741)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
C704S270000
Reexamination Certificate
active
06202050
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a voice activate transmitting device for a two way radio (or walkie-talkie) without incurring a losing words effect.
2. Description of the Invention
A conventional two way radio (or walkie-talkie) according to the prior art is shown in
FIG. 1
, and comprises a transmitting/receiving circuit, and a microphone amplifying circuit. The transmitting/receiving circuit comprises a demodulation circuit
11
, mixers
12
and
14
, a bandpass filter circuit
13
, a down converter circuit
15
, a transmitting/receiving signal interchange circuit
16
, a filter circuit
17
, a common antenna
18
, a quartz oscillation circuit
19
, a modulation circuit
20
, an up converter circuit
21
, a noise filter circuit
22
, a lowpass filter circuit
23
, an audio filter circuit
27
, a microprocessor
28
, a receiving circuit power supply control unit
29
, a transmitting circuit power supply control unit
30
, an identification code generating circuit
31
, a loudspeaker control circuit
32
, an amplifier
34
, and a loudspeaker
33
, etc. The microphone amplifying circuit comprises a microphone control circuit
24
, an amplifier
25
, and a microphone
26
.
By such an arrangement, when the user is intended to use the two way radio, he/she has to press a push button such that the transmitting circuit of the two way radio can transmit a voice signal. However, the related circuits will reach a steady working state during a period of time due to the capacity effect or others thereof, hereby causing a “transmitting delay” such that when the user talks to the two way radio before the related circuits reach the steady working state, part of the voice message cannot be received or will be lost by the receiving circuit of another two way radio of the other party, thereby making the voice message not perfect such that the other party easily misunderstands what the user means. In addition, the transmitting circuit and the receiving circuit of the two way radio both communicate with the outside through the same channel such that the transmitting circuit and the receiving circuit cannot be operated simultaneously. Therefore, when two opposite parties transmit voices simultaneously, the two opposite parties cannot actually receive the voice signals. Moreover, the user has to press the push button when he/she is intended to use the two way radio, thereby causing inconvenience to the user. The present invention has arisen to overcome the disadvantages of the conventional two way radio.
SUMMARY OF THE INVENTION
The primary objective of the invention is to provide a voice activate transmitting device for a two way radio. The two way radio includes a transmitting/receiving circuit, microphone, microphone amplifier, speaker and audio amplifier. The voice activate device comprises: a voice memory modual circuit which output connected to the transmitting/receiving circuit, and input connected to the microphone amplifier. A voice recognizer connected to the memory modual and the so called transmitting control circuit.
The voice memory modual can be an analog voice memory or a digital memory with a pair of A/D, D/A converters and is a first-in-first-out (F.I.F.O.) memory.
The transmitting control circuit is to access the memory address and to check whether the memory is full, if true then the next data is put at from the beginning of the memory and cover the original data to make the memory work as a “circular memory”. The voice recognizing circuit contains a plurality of pre-set variable values therein which are compared with the sound data input into the memory and to decide if the data is “possible be” the head of a voice to transmit. If true, put a pointer on it (or write down the address) and keep making sure whether it is the “actual voice data” to transmit and make a decision to transmit all of the voice data from the pointer. Or even put a string of blank signal before the pointer.
The transmitting control circuit is to access the transmitting circuit following the command of the voice recognizing circuit.
The two way radio preferably includes one microphone and amplifier, or alternatively includes two microphones and amplifiers. The two way radio further includes a voice activate hand-free set, and the voice activate hand-free set comprises a voice memory modual, a voice recognizing circuit, a transmitting control circuit, and an attachment which are all assembled into an unit so as to be used to the voice activate hand-free set of the two way radio. The attachment preferably includes at least a microphone, and a speaker.
Further objectives and advantages of the present invention will become apparent after a careful reading of the detailed description with reference to the accompanying drawings.
REFERENCES:
patent: 5657380 (1997-08-01), Mozer
Dorvil Richemond
E. Lead Electronic Co., Ltd.
Rosenberg , Klein & Lee
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