Akune Makoto

TL;DR: In this paper, the authors proposed a digital signal encoding apparatus in which the digital signal is divided into frequency components in plural frequency bands and the bandwidth of the frequency bands is.Iaddend.

TL;DR: In this article, an apparatus and method for processing an input digital signal in which an audio signal at an input terminal 11 is supplied via a one-block delay unit 17 to a difference unit 20, an output of which is processed by a noise-shaping circuit 21 and restored by a near-instantaneous compressor 26, a nearinstantic expander 27 and an accumulator 28 so as to be fed back to the difference unit to find a difference between a signal of a directly preceding sample and a signal in the current sample.

TL;DR: In this article, a spectrum analysis circuit is constituted of a spectrum conversion circuit, a noise spectrum setting circuit, and a coefficient arithmetic circuit, where the coefficient of a noise filter is controlled by a coefficient control signal in response to the permitted noise spectrum obtained at every critical band of the input signal outputted from the coefficient arithmetic circuits.

TL;DR: In this article, a digital audio signal from an input terminal 11 is transmitted through one block delay 17 to a difference 20, and an output from the difference 20 is restored through a noise shaping adding circuit 21, semi-instantaneous compressor 26, semi instantaneous expander 27, and accumulator 28.

TL;DR: In this paper, an apparatus and method for processing the input digital signal is disclosed, where an input digital audio signal at an input terminal 11 is supplied via a one-block delay unit 17 to a difference unit 20, an output of which is processed by an annexed noise-shaping circuit 21 and restored by a nearinstantaneous compressor 26, a near-instantaneously expander 27 and an accumulator 28 so as to be fed back to the difference unit20 to find a difference between a signal of a directly preceding sample and the signal of the current sample.