Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Dolby International Ab

Kosuke Nishio

Takeshi Norimatsu

Naoya Tanaka

Mineo Tsushima

Takashi Katayama

Masahiro Sueyoshi

Akihisa Kawamura

Masaharu Matsumoto

Takeshi Fujita

Kazutaka Abe

Shuji Miyasaka

Tomoki Ogawa

Ichiro Kawashima

Shinji Kojima

Tomoyuki Okada

Hiroshi Yahata

Wataru Ikeda

Tsuyoshi Nakamura

Ryoji Suzuki

Eiji Otomura

Yoshiaki Sawada

Tsukuru Ishito

Hideyuki Kakuno

Naoki Shindou

Naoya c/o Matsushita ElectIndCoLtd Tanaka

Mineo c/o Matsushita Electric IndCoLtd Tsushima

An encoding device () includes an MDCT unit () that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit () that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit () that encodes to output the lower frequency spectrum obtained by the MDCT unit () and the extension data obtained by the BWE encoding unit (). The BWE encoding unit () generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit () and (ii) a second parameter which specifies a gain of the lower subband after being copied.

Encoding device and decoding device

A communication terminal includes a decoder which decodes an input bitstream received from another communication terminal, to generate an output audio signal and outputs the generated output audio signal to a speaker; and an echo canceller which obtains an input audio signal representing sound captured by a microphone placed in a space to which the speaker outputs the sound, and removes, for respective subbands, an echo component included in the obtained input audio signal and corresponding to the output audio signal, to generate an audio signal for transmission. An encoder codes the audio signal for transmission to generate an output bitstream and transmits the generated output bitstream to another communication terminal; and a control unit controls, for the respective subbands, echo cancellation processing according to a reproduction band of at least one of the output audio signal and the audio signal for transmission.

Communication terminal and communication method

An audio decoding apparatus comprises: a plurality of decoding units; a band replicating unit which processes a decoded signal obtained when a corresponding decoding unit decodes a coded signal, according to a scheme specified by transmitted information; and an information transmitting unit which transmits, to a signal processing unit, information identifying the corresponding decoding unit from among the plurality of decoding units.

Audio decoding apparatus, audio coding apparatus, and system comprising the apparatuses

An audio mixing/reproducing device includes an audio decoder () configured to decode an encoded audio input signal, an audio mixer () configured to mix an audio signal output from the audio decoder () with a non-encoded external audio input signal, and an audio encoder () configured to encode an audio signal output from the audio mixer () to generate an encoded audio output signal, and in addition, a switch () configured to generate a switch signal for controlling operations of each of the audio decoder () and the audio encoder () in response to a switch activation signal. The audio decoder () and the audio encoder () each support a plurality of encoding schemes, and the switch (), when switching the encoding scheme of the audio decoder () from a first encoding scheme to a second encoding scheme, controls the audio decoder () and the audio encoder () so that the encoding scheme of the audio encoder () is switched from the first encoding scheme to the second encoding scheme as in the audio decoder ().

Audio mixing/reproducing device

The present invention provides an information recording medium in which an access unit including basic data and extension data is recorded, so as to allow a decoder that decodes only basic data to process the access unit which includes the basic data and the extension data for the next generation. The information recording medium is an information recording medium on which a stream is recorded, the stream having plural access units and including at least one of video and audio, wherein each of the access units has basic data and extension data related to the basic data, the basic data is data that can be decoded into a completed state without requiring the extension data, and the extension data is data for improving the quality of data generated from the basic data, and information indicating that the extension data is included in each of the access units is recorded in an area, included in the access unit, which cannot be identified by the decoder which decodes only the basic data.

Information recording medium, data sorting device, and data reproduction device

A decoding apparatus includes: a decoding section for decoding a first one of input encoded audio data sets that has been encoded by a certain encoding method; a first output section for outputting audio data decoded by the decoding section, in accordance with a first output control signal; a second output section for externally outputting the first one of the input encoded audio data sets, or a second one of the input encoded audio data sets, in accordance with a second output control signal; a copyright information detection section for detecting copyright information from the audio data decoded by the decoding section; a communications section for communicating with an external device which receives the encoded audio data set output from the second output section; and an output control section for outputting the first and second output control signals in accordance with the copyright information and a copyright information detection result received by the communications section from the external device.

Decoding apparatus

Growing community of inventors

Moriguchi, Japan

Kosuke Nishio