Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Socionext Inc.

Yoriko Yagi

Junichi Nakahashi

Takeshi Norimatsu

Tomokazu Ishikawa

Mineo Tsushima

Mitsuhiko Serikawa

Yoshihisa Nakatoh

Taro Katayama

Miho Tanji

Teruyuki Morita

Yasutaka Ogama

The present invention provides an audio video recording device which can easily post video contents on a video-sharing website without editing the video data to be posted. The audio video data recording device for recording audio and video data includes: a camera unit to which a captured moving image is inputted; a high-quality coding unit for compressing the moving image captured by the camera unit with a high image quality; a high-quality data storage unit for recording therein data of the compressed moving image outputted from the high-quality coding unit; a low-quality coding controller for starting or suspending a low-quality recording process during the high-quality recording process; a low-quality coding unit for compressing the moving image captured by the camera unit with a low image quality in accordance with an instruction by the low-quality coding controller; a low-quality data storage unit for recording therein data of the compressed moving image outputted from the low-quality coding unit; and a communication unit for transferring the moving image data recorded in the low-quality data storage unit to a different apparatus.

Audio video recording device

A normal image quality coding unit generates normal-quality compressed moving image data by compressing moving image data generated by capturing an image around a vehicle with a normal image quality. A high image quality coding unit generates high-quality compressed moving image data by compressing the moving image data with an image quality higher than the normal image quality. The normal-quality compressed moving image data is recorded in a normal image quality data storage unit. A trigger detection unit detects an abnormal condition which possibly happens to the vehicle currently travelling. A high image quality data storage unit records therein the high-quality compressed moving image data based on a timing by which the abnormal condition is detected by the trigger detection unit.

In-vehicle device for recording moving image data

An audio signal compression apparatus for compressively coding an input audio signal comprises a time-to-frequency transformation unit for transforming the input audio signal to a frequency domain signal; a spectrum envelope calculation unit for calculating a spectrum envelope having different resolutions for different frequencies, from the input audio signal, using a weighting function on frequency based on human auditory characteristics; a normalization unit for normalizing the frequency domain signal using the spectrum envelope to obtain a residual signal; a power normalization unit for normalizing the residual signal by the power; an auditory weighting calculation unit for calculating weighting coefficients on frequency, based on the spectrum of the input audio signal and human auditory characteristics; and a multi-stage quantization device having plural stages of vector quantizers connected in series, to which the normalized residual signal is input, and at least one of the vector quantizers quantizing the residual signal using the weighting coefficients. Therefore, a low frequency band, which is auditively important, can be analyzed with a higher frequency resolution as compared with a high frequency band, whereby efficient signal compression utilizing human auditory characteristics is realized.

Audio signal compression method, audio signal compression apparatus, speech signal compression method, speech signal compression apparatus, speech recognition method, and speech recognition apparatus

Speech recognition method and apparatus using frequency warping of linear prediction coefficients

Growing community of inventors

Osaka, Japan

Yoriko Yagi