Acoustic device and reproduction mode setting method
View Patent ↗The process control unit ( 11 ) of a microcomputer ( 1 ) controls a decoder ( 21 ) to decode an input signal, and acquires the voice format information of an input signal. The process control unit ( 11 ) calls the processing method of matrix processing stored in a storage unit ( 12 ) based on the acquired voice format information. The process control unit ( 11 ) further acquires encode channel-related information from an input signal. When the encode channel is 2-channel, the process control unit ( 11 ) controls a surround processor ( 22 ) to perform matrix processing on an input signal and output a multi-channel-based voice. An acoustic device capable of setting a reproduction mode according to an input signal is realized.
1. An acoustic device which operates to receive an input of an audio signal contained information on an audio format and the number of audio channels and to set a reproduction mode for performing audio reproduction on the basis of the audio signal, the acoustic device comprising:
storage means for storing setting information for reproduction mode including information on a type of multi-channel processing for a plurality of audio formats in such a way of being able to update the setting information for each of the audio formats;
input reception means for receiving an input of the setting information for reproduction mode;
update means for updating setting information for reproduction mode stored in the storage means in accordance with the setting information for reproduction mode received by the input reception means;
audio information acquisition means for acquiring information on an audio format and the number of audio channels of an inputted audio signal from the inputted audio signal;
decision means responsive to the information on the audio format of the audio signal acquired by the audio information acquisition means for reading setting information of a reproduction mode for a corresponding audio format out of the storage means to decide the number of channels obtained based on information on a type of multi-channel processing contained in the read setting information; and
reproduction mode setting means for setting a mode of a multi-channel processing for converting the audio signal into multi-channel with the number of channels decided by the decision means if the number of audio channels of the audio signal acquired by the audio information acquisition means is less than the number of channels decided by the decision means.
2. The acoustic device according to claim 1 , wherein the audio signal is a compressed audio digital signal,
wherein the audio information acquisition means includes decode means for decoding the audio digital signal to acquire the information on the audio format and the number of channels of the audio digital signal and to output audio data based on the audio digital signal, and
wherein the reproduction mode setting means operates to set a mode of multi-channel processing for converting the audio data outputted from the decode means into multi-channel.
3. The acoustic device according to claim 1 or 2 , further comprising multi-channel processing means for performing multi-channel processing with the mode set by the reproduction mode setting means to convert the audio signal into multi-channel,
wherein the audio signal includes information on compression formats of the audio signal as the information on the audio format,
wherein the storage means stores setting information of a reproduction mode for each of a plurality of compression formats, and
wherein the decision means is based on the information on the compression formats of the information on the audio format acquired by the audio acquisition means to read setting information of a reproduction mode for a corresponding compression format out of the storage means and to decide the number of channels to be obtained by the set multi-channel processing on the basis of the setting of the multi-channel processing included in the setting information.
4. A signal processing method to be executed by a hardware processor, wherein the method performs receiving an input of an audio signal contained information on an audio format and the number of audio channels and setting a reproduction mode for performing audio reproduction on the basis of the audio signal, the method comprising the steps of:
storing setting information for reproduction mode including information on a type of multi-channel processing for a plurality of audio formats in such a way of being able to update the setting information for each of the audio formats;
receiving an input of the setting information for reproduction mode;
updating setting information for reproduction mode stored in the storage means in accordance with the setting information for reproduction mode received by the input reception means;
acquiring information on an audio format and the number of audio channels of an inputted audio signal from the inputted audio signal;
responding to the information on the audio format of the audio signal acquired by the audio information acquisition means for reading setting information of a reproduction mode for a corresponding audio format out of the storage means to decide the number of channels obtained based on information on a type of multi-channel processing contained in the read setting information; and
setting a mode of a multi-channel processing for converting the audio signal into multi-channel with the number of channels decided by the decision means if the number of audio channels of the audio signal acquired by the audio information acquisition means is less than the number of channels decided by the decision means.
5. A non-transitory computer readable medium storing a computer program which causes a computer to execute a method for receiving an input of an audio signal contained information on an audio format and the number of audio channels and to set a reproduction mode for performing audio reproduction on the basis of the audio signal, the method comprising the steps of:
storing setting information for reproduction mode including information on a type of multi-channel processing for a plurality of audio formats in such a way of being able to update the setting information for each of the audio formats;
receiving an input of the setting information for reproduction mode; updating setting information for reproduction mode stored in the storage means in accordance with the setting information for reproduction mode received by the input reception means;
acquiring information on an audio format and the number of audio channels of an inputted audio signal from the inputted audio signal;
responding to the information on the audio format of the audio signal acquired by the audio information acquisition means for reading setting information of a reproduction mode for a corresponding audio format out of the storage means to decide the number of channels obtained based on information on a type of multi-channel processing contained in the read setting information; and
setting a mode of a multi-channel processing for converting the audio signal into multi-channel with the number of channels decided by the decision means if the number of audio channels of the audio signal acquired by the audio information acquisition means is less than the number of channels decided by the decision means.