Method and apparatus to encode and decode an audio/speech signal
First Claim
Patent Images
1. An apparatus for decoding an audio or speech signal, the apparatus comprising:
- a determination unit configured to receive a signal in a bitstream as an input and determine whether the signal is encoded in a frequency domain or a time domain based on encoding information included in the bitstream;
a frequency domain decoding unit configured to loss-less decode and dequantize the signal when it is determined that the signal is encoded in the frequency domain;
a temporal noise shaping unit configured to perform a temporal noise shaping on the dequantized signal;
an inverse transform unit configured to inverse-transform the temporal noise shaped signal to a time domain signal;
a time domain decoding unit configured to reconstruct the signal by using a linear prediction based decoding when it is determined that the signal is encoded in the time domain; and
a high frequency generating unit configured to generate a high band signal using either the inverse-transformed signal or the reconstructed signal and output the high band signal.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus to encode and decode an audio/speech signal is provided. An inputted audio signal or speech signal may be transformed into at least one of a high frequency resolution signal and a high temporal resolution signal. The signal may be encoded by determining an appropriate resolution, the encoded signal may be decoded, and thus the audio signal, the speech signal, and a mixed signal of the audio signal and the speech signal may be processed.
38 Citations
3 Claims
-
1. An apparatus for decoding an audio or speech signal, the apparatus comprising:
-
a determination unit configured to receive a signal in a bitstream as an input and determine whether the signal is encoded in a frequency domain or a time domain based on encoding information included in the bitstream; a frequency domain decoding unit configured to loss-less decode and dequantize the signal when it is determined that the signal is encoded in the frequency domain; a temporal noise shaping unit configured to perform a temporal noise shaping on the dequantized signal; an inverse transform unit configured to inverse-transform the temporal noise shaped signal to a time domain signal; a time domain decoding unit configured to reconstruct the signal by using a linear prediction based decoding when it is determined that the signal is encoded in the time domain; and a high frequency generating unit configured to generate a high band signal using either the inverse-transformed signal or the reconstructed signal and output the high band signal. - View Dependent Claims (2, 3)
-
Specification