APPARATUS AND METHOD FOR SELECTING ONE OF A FIRST ENCODING ALGORITHM AND A SECOND ENCODING ALGORITHM

摘要

An apparatus for selecting one of a first encoding algorithm having a first characteristic and a second encoding algorithm having a second characteristic for encoding a portion of an audio signal to obtain an encoded version of the portion of the audio signal has a first estimator for estimating a first quality measure for the portion of the audio signal, which is associated with the first encoding algorithm, without actually encoding and decoding the portion of the audio signal using the first encoding algorithm. A second estimator is provided for estimating a second quality measure for the portion of the audio signal, which is associated with the second encoding algorithm, without actually encoding and decoding the portion of the audio signal using the second encoding algorithm. The apparatus has a controller for selecting the first or second encoding algorithms based on a comparison between the first and second quality measures.

主权项

1. An apparatus for selecting one of a first encoding algorithm comprising a first characteristic and a second encoding algorithm comprising a second characteristic for encoding a portion of an audio signal to acquire an encoded version of the portion of the audio signal, comprising:
a first estimator for estimating a first quality measure for the portion of the audio signal, the first quality measure being associated with the first encoding algorithm, without actually encoding and decoding the portion of the audio signal using the first encoding algorithm; a second estimator for estimating a second quality measure for the portion of the audio signal, the second quality measure being associated with the second encoding algorithm, without actually encoding and decoding the portion of the audio signal using the second encoding algorithm; and a controller for selecting the first encoding algorithm or the second encoding algorithm based on a comparison between the first quality measure and the second quality measure, wherein the first and second quality measures are SNRs (signal to noise ratio) or segmental SNRs of the corresponding portion of a weighted version of the audio signal.