Sanyo Electric Co., Ltd.

Sanyo Electric., Ltd.

Masayuki Iida

Shinichi Tsurufuji

Hiroshi Tanaka

Hiroki Ohnishi

Shigeyuki Okada

Hideki Yamauchi

Kazumi Ohkura

Masanori Miyatake

Shozo Sugishita

Ryuji Suzuki

Shoichi Kamei

Teruo Hoshi

Kiyoshi Tajima

Shin-ichi Tsurufuji

A voice recognition method and apparatus in which an electrical signal corresponding to ambient noise is used to set a threshold value in accordance with the level of the ambient noise and a voice signal applied to a microphone is cut-out for processing if it exceeds the threshold value. The processing includes comparison of the voice signal cut-out with stored patterns of voice signals.

Apparatus and method for recognizing voice with reduced sensitivity to ambient noise

A audio reproducing apparatus includes an audio decoder and a voice speed converting unit. The audio decoder decodes an audio data stream to produce an audio signal. The voice speed converting unit converts the audio signal in such a manner that when a bit rate is higher than a normal bit rate, a pitch of a reproduced sound interval is the same as the pitch of the sound interval in a normal playback mode and a voice speed in the reproduced sound interval approaches a voice speed in a sound interval in the normal playback mode. The voice speed converting unit further performs voice speed conversion on the audio signal in such a manner that when the bit rate is lower than the normal bit rate, the sound interval is not noticeably interrupted.

Audio reproducing apparatus having voice speed converting function

In a voice speed converting system according to the present invention, an input sound signal is subjected to voice speed conversion processing by a voice speed conversion processing device. Output from the voice speed conversion processing device is written to a ring memory. Data written to the ring memory are read out at a predetermined speed. The amount of stored data in the ring memory is calculated on the basis of a write signal and a read signal for the ring memory by stored data amount calculating device. The voice speed converting device includes a section judging device that judges which of a voice section and a silence section corresponds to the input sound signal. The input sound signal is subjected to compression and expansion processing or deletion processing, in response to an output of the section judging device and an output of the stored data amount calculating device by a signal processing device.

System for controlling voice speed of an input signal

In an automatic dial telephone that is usuable in a motor vehicle, when a voice input is provided during a period in which input of the names of called parties is awaited, a voice pattern of the name of the called party is compared with reference patterns of called parties stored in reference pattern storing device, to determine the degree of the similarity therebetween. The names of the called parties are output to a user in the order of decreasing degree of similarity. Each time the name of a called party is output, a command word for confirmation is a waited from a user for a predetermined time period. When a voice confirmation command is input and is recognized during this waiting period, a telephone number corresponding to the name of the called party is supplied to a channel. Consequently, the command word for confirmation may be input only if the name of the called party outputted is one desired by the user. Sensors continually monitor the driving condition of the motor vehicle in which the telephone is installed. When the operation of the steering wheel or brakes of the motor vehicle exceeds a predetermined threshold or the speed of the motor vehicle is excessive, the sensors generate safety signals that inhibit the operation of the telephone.

Automatic dial telephone

The invention is directed to a prower-supply transfer apparatus for a telephone wherein the power supply is fed from a telephone line by a power supply transferring circuit when the operation has been decided as a low speed operation by a speed deciding circuit, the power supply is fed from a separate power supply circuit by the power-supply transferring circuit when the operation has been decided as the high speed operation, so that the low-speed operation is performed through the speed control by the speed decision result not only when the processing may be performed even at the low speed operation in the common telephone or the like, but also when the high-speed processing is required in voice recognition or the like.

Power-supply transfer apparatus for telephone

An automatic on-hook arrangement which includes a voice detecting circuit for detecting input voice from a micro-phone, a timer for measuring time in which the input voice from the micro-phone is not detected, a warning section which emits warning upon measurement of a predetermined time by the timer, a warning releasing switch for releasing the warning, a telephone line control circuit for cutting off a telephone line, and a control section connected to each of the above components. The warning section emits the warning when the input voice is not detected for the predetermined time by the voice detecting circuit, and the telephone line control circuit cuts off the telephone line when the warning is not released, and further, the input voice is not detected for another predetermined time.

Automatic on-hook arrangement

Correction of a voice reference pattern of a so-called voice recognizing telephone having a voice recognizing function, whereby the frequency of voices inputted before the voices are correctly recognized is measured by the counter, the voice reference pattern may be corrected by the voice pattern correcting circuit in accordance with the voice inputting frequency, so that a practical voice recognizing telephone which is capable of high recognition ratio may be provided.

Voice recognizing telephone

This invention relates to a speech recognition apparatus for raising the recognition speed, which is provided with first and second processors, the first processor mainly carrying out feature extraction of the input speech, the second one mainly carrying out comparison and distinction of feature extraction patterns with and from the reference patterns, thereby processing the feature extraction hand comparison and distinction in an equilibrium manner and expecting the speech recognition at high speed. Another apparatus has been proposed which allows the first processor to carry out the comparison and distinction process in parts, thereby raising the recognition rate and performing the recognition at further high speed.

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Yawata, Japan

Masayuki Iida