TH127544B - Signal processors and signal processing methods, encoders and encoding methods. Code withdrawers and decryption methods and programs - Google Patents

Abstract

The invention involved a signal processor. And encoder signal processing and encryption methods. Decoders and decoding methods And programs that can be reproduced Music signals have better sound quality by expanding the frequency band. The sampling frequency changer changes the sampling frequency of the input signal, and the sub-band divides the input signal after the sampling changes to a band signal. The subband of the subband with the number corresponding to the sampling frequency. The artificially high frequency subband power calculator calculates the subband power of the Pseudo-high-frequency bands based on the low-frequency signal of the incoming signal and the coefficient table with coefficients for each subband of the high-band. The difference calculation circuit The power of the subband of the artificially high frequency band compares the power of the high frequency subband and The power of the sub-bands of the artificially high frequency bands with each other And will select a table of coefficients from the table A number of coefficients Besides that Index of coefficients Which indicates a table of values The coefficients are encoded. And it is defined as data that is encoded in high frequency band, the invention can be applied to encoders.

Claims (1)

1. Integrated signal processor Sub-bar break set It receives an input signal with a non-regulated sampling frequency as an input and produces a signal in a sub-band of a number of sub-bands on the low-band side. Of the input signal And the signal in the high-frequency subband of a number of sub-bands on the side High frequency of the sending signal Where the sub-bands on the high-frequency band have a number that corresponds to the frequency Sampling of the sending signal The power calculation of the subband of the artificially high frequency band, which