Patent
Coding device, decoding device, coding method, and decoding method
Masahiro Oshikiri
- 28 Apr 2003
69
TL;DR: In this article, an up-sampling device was used to increase the sampling rate of the decoded signal from FH to FH by using the decoding result parameter output from the local decoding device.
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Abstract: A down-sampling device (101) down-samples the input signal sampling rate from a sampling rate FH to a sampling rate FL. A basic layer coding device (102) encodes an acoustic signal of the sampling rate FL. A local decoding device (103) decodes an encoded code output from the basic layer coding device (102). An up-sampling device (104) increases the sampling rate of the decoded signal to FH. A subtractor (106) subtracts the decoded signal from the acoustic signal of the sampling rate FH. An extended layer coding device (107) encodes the signal output from the subtractor (106) by using the decoding result parameter output from the local decoding device (103).
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Citations
Patent
Encoding device, decoding device, and method thereof
Tomofumi Yamanashi,Masahiro Oshikiri +1 more
- 29 Feb 2008
TL;DR: The speech encoding apparatus (220) as mentioned in this paper has a first layer encoding section (2201), a first-layer decoding section (2202), a delay section(2203), a subtracting section (104), a frequency domain transforming section (101), a second-layer encoding section(105) and a multiplexing section(106).
186
Patent
Encoding device and encoding method
Toshiyuki Morii,Masahiro Oshikiri,Tomofumi Yamanashi +2 more
- 29 Feb 2008
TL;DR: In this article, a shape quantization unit is used to obtain a sound quality preferable for auditory sense even if the number of information bits is small, provided that an encoding device which can obtain sound quality preferred for the auditory sense is provided.
84
Patent
Audio encoding device and audio encoding method
Koji Matsushita Electric Industrial Co. Ltd Yoshida
- 27 Apr 2006
TL;DR: In this paper, a correlation degree comparison unit (304) calculates correlation in a first channel (correlation degree between the past signal and the current signal in the first channel) from the first-channel audio signal, and a second-channel signal generation unit (311) compares the correlation in the two channels and selects the channel having the greater correlation.
66
Patent
Audio encoding apparatus, audio decoding apparatus, communication apparatus and audio encoding method
Koji c o Matsushita El. Ind. Co. Ltd. Yoshida
- 15 Sep 2005
TL;DR: In this article, a low frequency component waveform encoding part calculates, based on a quantized LPC received from an LPC encoding part (202), a linear prediction residual signal of a digital audio signal received from a A/D converter (112), then performs a down sampling of the calculation result to extract the low frequency components comprising bands, which are lower than a predetermined frequency, in the audio signal.
61
Patent
Scalable encoding device and scalable encoding method
Michiyo Goto,Koji Yoshida +1 more
- 29 May 2006
TL;DR: In this article, an extension layer is coarsely divided into a system for processing a first channel and a system that processes a second channel, and outputs the predicted drive sound source signal through a multiplier (113) to a CELP encoding unit (114).
59
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