Kabushiki Kaisha Toshiba

Hiroshi Yonekubo

Hirokazu Takeuchi

Masakazu Suzuki

According to one embodiment, an audio controlling apparatus includes a first receiver configured to receive audio signal, a second receiver configured to receive environmental sound, a temporary gain calculator configured to calculate temporary gain based on environmental sound received by second receiver, a sound type determination module configured to determine sound type of main component of audio signal received by first receiver, and a gain controller configured to stabilize temporary gain that is calculated by temporary gain calculator and set gain, when it is determined that sound type of main component of audio signal received by first receiver is music.

Audio controlling apparatus, audio correction apparatus, and audio correction method

According to one embodiment, audio controlling apparatus includes first receiver configured to receive audio signal, second receiver configured to receive environmental sound, masking gain calculator configured to calculate masking gain for each frequency band, based on audio signal and environmental sound, and gain controller configured to smooth masking gain of frequency band that is less than preset threshold frequency in first interval, smooth masking gain of frequency band that is equal to or higher than threshold frequency in second interval that is longer than first interval, and thereby set gain.

A sound quality correcting apparatus includes: an input module; a feature quantity calculator; a score calculator; a modulation spectrum power calculator; a score corrector; and a signal corrector. The input module receives an input audio signal. The feature quantity calculator calculates feature quantities of the input audio signal for each of a plurality of first intervals having a certain time length. The score calculator calculates a score value for each the first interval based on the feature quantities. The modulation spectrum power calculator calculates a power value, at a certain modulation frequency, of a modulation spectrum of the input audio signal. The score corrector corrects score values in the plurality of first intervals that belong to a second interval if a power value calculated in the second interval is larger than or equal to a certain value. The signal corrector corrects the audio signal based on the score values.

Sound quality correcting apparatus and sound quality correcting method

According to one embodiment, there is provided a sound quality control apparatus, including: a characteristic parameter extractor; a speech score calculator; a music score calculator; a power value acquisition module; a first storage configured to store speech scores and music scores; a second storage configured to store power values; a power-based score corrector configured to correct a current music score or a current speech score based on a first comparison result between a current power value and past power values, a second comparison result between the current music score and past music scores and a third comparison result between the current speech score and past speech scores; and a sound quality controller configured to perform a sound quality control by using at least one of the speech score and the music score corrected by the power-based score corrector.

Sound quality control apparatus and sound quality control method

According to one embodiment, a sound quality control device includes: a time domain analysis module configured to perform a time-domain analysis on an audio-input signal; a frequency domain analysis module configured to perform a frequency-domain analysis on a frequency-domain signal; a first calculation module configured to calculate first speech/music scores based on the analysis results; a compensation filtering processing module configured to generate a filtered signal; a second calculation module configured to calculate second speech/music scores based on the filtered signal; a score correction module configured to generate one of corrected speech/music scores based on a difference between the first speech/music score and the second speech/music score; and a sound quality control module configured to control a sound quality of the audio-input signal based on the one of the corrected speech/music scores.

Sound quality control device and sound quality control method

According to one embodiment, various feature parameters are calculated for distinguishing between a speech and music and between music and background sound for an input audio signal. With the feature parameters, score determination is made as to whether the input audio signal is close to a speech signal or a music signal. If the input audio signal is determined to be close to music, the preceding score determination result is corrected considering the influence of background sound. Based on the corrected score value, a sound quality correction process for a speech or music is applied to the input audio signal.

Sound quality correction apparatus, sound quality correction method and program for sound quality correction

According to one embodiment, various characteristic parameters for determining whether an input audio signal is a voice signal or a music signal are calculated and the calculated characteristic parameters are compared with a threshold value for voice determination and a threshold value for music determination. A voice characteristic score is provided to a characteristic parameter indicating voice and a music characteristic score is provided to a characteristic parameter indicating music. Then, based on a difference between a sum total of voice characteristic scores and a sum total of music characteristic scores, it is determined whether the input audio signal is a voice signal or a music signal.

Voice/music determining apparatus, voice/music determination method, and voice/music determination program

According to one embodiment, sound quality control processing for speech or music is performed by calculating various kinds of characteristic parameters to determine a speech signal and a music signal from an input audio signal and determining the input audio signal closer to the speech signal or music signal based on a score difference between a sum of scores provided to characteristic parameters indicating the speech signal and that of scores provided to characteristic parameters indicating the music signal.

Sound quality control apparatus, sound quality control method, and sound quality control program

A voice/music determining apparatus is configured to calculate first feature parameters for discriminating between a voice signal and a musical signal; and calculate second feature parameters for discriminating between a musical signal and a background-sound-superimposed voice signal. A first score is calculated to indicate likelihood that the input audio signal is a voice signal or a musical signal as a sum of weight-multiplied first feature parameters. A second score is calculated to indicate likelihood that the input audio signal is a musical signal or a background-sound-superimposed voice signal as a sum of weight-multiplied second feature parameters. It is determined whether the input audio signal is a voice signal or a musical signal on the basis of the first score. Further, it is determined whether the musical signal is the input audio signal is a background-sound-superimposed voice signal on the basis of the second score.

Voice/music determining apparatus and method

According to one embodiment, a broadcast reception apparatus includes a reception unit which receives a broadcast signal, and outputs a transport stream, a first determination unit which receives the transport stream as TS packets, and determines whether a PES header exists in each TS packet, a second determination unit which determines whether the PES header is normal, when the first determination unit detects the PES header, a search unit which detects a payload start position by searching the TS packet sequentially from the rear end, when the second determination unit determines the PES header to be abnormal, a separator which separates payloads at and after the payload start position, and a decoder which decodes the separated payloads of the TS packets, and outputs video and audio signals.

Growing community of inventors

Tokyo, Japan

Hiroshi Yonekubo