Pioneer Corporation

Shisei Cho

Katsumi Amano

Hiroyuki Ishihara

Yoshikazu Takeuchi

Soichi Toyama

A record/play device includes a recording unit that records, on a recording medium, a series content data sequentially input to the record/play device, a playback unit that plays back, while recording the data by the recording unit, the content data recorded on the recording medium, and a control unit that controls simultaneous record and play. The control unit includes a data size changing unit that changes a data size at which the content data is to be recorded on the recording medium to a data size different from a data size at which content data that has been recorded on the recording medium is recorded.

Record reproducing device, simultaneous record reproduction control method and simultaneous record reproduction control program

A recording and reproduction system includes a recording system and a reproduction system. The reproduction system reproduces (simultaneous reproduction) data of content while the data is being recorded by the recording system. The recording system records information on recording process to a management area as management data. The reproduction system reads the management data to control reproduction.

Record reproducing system, record reproducing method and record reproducing program

A digital dubbing device that compresses and stores music data for each sound unit includes a music data counter that counts the number of samples of music data when the music data is to be compressed, and detects a music data stream located in the end part of the sound unit from the music data based on TOC information of the music data and the number of samples of the music data counted; a data storage unit that stores the music data stream detected; a music data comparator that detects a music data stream identical to the music data stream stored from the music data when dubbing of the music data is interrupted; and a controller that causes the dubbing of the music data to be restarted from music data following the music data stream detected.

Digital dubbing device

A speech synthesizing method which synthesizes speech naturally is disclosed. Standardized frame power values of an n-th frame is calculated when frame power values at head and tail frames in a phoneme are standardized. An average value of the power values sampled from the power frequency characteristics in the n-th frame at a predetermined frequency interval is set as a mean frame power value. A sum of squares of signal levels in one frame of a frequency signal from a sound source is calculated as a frame power correction value. A speech envelope signal is calculated as a function having variables of the standardized frame power values, the frame power correction value and the mean frame power value. The speech envelope signal adjusts the amplitude level of a speech waveform signal supplied from a vocal tract filter according to the level of the speech envelope signal.

Speech synthesis method

A method for forming phoneme data and a voice synthesizing apparatus for phoneme data in the voice synthesizing apparatus is provided. In this method and apparatus, an LPC coefficient is obtained for every phoneme and is set to temporary phoneme data and a first LPC Cepstrum based on the LPC coefficient is obtained. A second LPC Cepstrum is obtained based on each voice waveform signal which has been synthesized and generated by the voice synthesizing apparatus while the pitch frequency is changed step by step with a filter characteristic of the voice synthesizing apparatus being set to a filter characteristic according to the temporary phoneme data. Further, an error between the first and second LPC Cepstrums is obtained as an LPC Cepstrum distortion. Each phoneme in the phoneme group belonging to the same phoneme name in each of the phonemes is classified into a plurality of groups every frame length. The optimum phoneme is selected based on the LPC Cepstrum distortion every group from this group. The temporary phoneme data corresponding to this phoneme is used as final phoneme data.

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Saitama, Japan

Shisei Cho