Patent ID: 11908485
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
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, 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 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; 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 second estimator is configured to determine an estimated adaptive codebook distortion for each sub-portion of a plurality of sub-portions of the portion of the audio signal, and wherein the second estimator is further configured to take an innovative codebook into consideration by reducing the estimated adaptive codebook distortion determined for each sub-portion of the portion of the audio signal using a constant factor.