US Patent Application 18031588. SOUND SIGNAL REFINEMENT METHOD, SOUND SIGNAL DECODE METHOD, APPARATUS THEREOF, PROGRAM, AND STORAGE MEDIUM simplified abstract
SOUND SIGNAL REFINEMENT METHOD, SOUND SIGNAL DECODE METHOD, APPARATUS THEREOF, PROGRAM, AND STORAGE MEDIUM
Organization Name
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor(s)
SOUND SIGNAL REFINEMENT METHOD, SOUND SIGNAL DECODE METHOD, APPARATUS THEREOF, PROGRAM, AND STORAGE MEDIUM - A simplified explanation of the abstract
This abstract first appeared for US patent application 18031588 titled 'SOUND SIGNAL REFINEMENT METHOD, SOUND SIGNAL DECODE METHOD, APPARATUS THEREOF, PROGRAM, AND STORAGE MEDIUM
Simplified Explanation
- The technology improves the quality of a decoded sound signal obtained from a different code derived from the same sound signal. - A decoded sound common signal is obtained by downmixing the decoded sound signal of each channel. - The decoded sound common signal is upmixed to generate an upmixed common signal. - The upmixed common signal is subjected to signal purification using an upmixed monaural decoded sound signal. - The purified upmixed signal is generated through signal purification. - The upmixed common signal is subtracted from the decoded sound signal in each channel. - The purified upmixed signal is added to the subtracted signal. - This process generates a purified decoded sound signal.
Original Abstract Submitted
There is provided a technology that improves, in a case where there is a sound signal obtained from a different code that is different from a code from which a decoded sound signal is obtained and that is derived from the same sound signal, the decoded sound signal by using the sound signal obtained from the different code. A signal (hereinafter, referred to as an upmixed common signal) obtained by upmixing a decoded sound common signal obtained by downmixing a decoded sound signal of each channel is subjected to signal purification using a signal (hereinafter, referred to as an upmixed monaural decoded sound signal) obtained by upmixing a monaural decoded sound signal to thereby generate a purified upmixed signal, and in each channel, the upmixed common signal is subtracted from the decoded sound signal and the purified upmixed signal is added thereto, to thereby generate a purified decoded sound signal.
