Frequency band extending apparatus, frequency band extending method, player apparatus, playing method, program and recording medium

Abstract

A player apparatus for playing an input signal after band-extending the input signal includes: an extension controller to determine an extension start band for the input signal in accordance with information relating to the input signal; and a band divider to divide the input signal into a plurality of sub-band signals. The frequency band is extended on the basis of a plurality of the sub-band signals on a side lower than the extension start band, among the plurality of sub-band signals into which the input signal is band-divided by the band divider.

1 - 10 . (canceled) 
     
     
         11 . A player apparatus for playing an input signal after band-extending the input signal, comprising:
 extension control means for determining an extension start band for the input signal in accordance with information relating to the input signal; and   band dividing means for dividing the input signal into a plurality of sub-band signals,   wherein the frequency band is extended on the basis of a plurality of the sub-band signals on a side lower than the extension start band, among the plurality of sub-band signals into which the input signal is band-divided by the band dividing means.   
     
     
         12 . A player apparatus according to  claim 11 , wherein
 the input signal is a signal obtained by subjecting encoded data which is encoded, to a decoding processing.   
     
     
         13 . A playing method for playing an input signal after band-extending the input signal, comprising:
 determining an extension start band for the input signal in accordance with information relating to the input signal;   dividing the input signal into a plurality of sub-band signals; and   extending the frequency band on the basis of a plurality of the sub-band signals on a side lower than the extension start band, among the plurality of sub-band signals into which the input signal is band-divided.   
     
     
         14 . A program for causing a computer to execute a process of playing an input signal after band-extending the input signal, comprising:
 an extension control step of determining an extension start band for the input signal in accordance with information relating to the input signal;   a band dividing step of dividing the input signal into a plurality of sub-band signals; and   a frequency band extending step of extending the frequency band on the basis of a plurality of the sub-band signals on a side lower than the extension start band, among the plurality of sub-band signals into which the input signal is band-divided in the band dividing step.   
     
     
         15 - 18 . (canceled)