Adaptive RD Optimized Hybrid Sound Coding
article
Traditionally, sound codecs have been developed with a particular application in mind,
their performance being optimized for specific types of input signals, such as speech or audio
(music), and application constraints, such as low bit rate, high quality, or low delay. There is,
however, an increasing need for more generic sound codecs, created by the emergence of
heterogeneous networks and the convergence of communication and entertainment devices.
To obtain such versatility, this study employs hybrid sound coding based on operational
rate-distortion (RD) optimization principles. Applying this concept, a prototype coder has
been implemented with emphasis on (dynamic) adaptation to the input and to application
constraints. With this prototype, listening tests have been performed for different application
scenarios. The results demonstrate the versatility of the concept while keeping competitive
sound quality compared to dedicated state-of-the-art codecs.
their performance being optimized for specific types of input signals, such as speech or audio
(music), and application constraints, such as low bit rate, high quality, or low delay. There is,
however, an increasing need for more generic sound codecs, created by the emergence of
heterogeneous networks and the convergence of communication and entertainment devices.
To obtain such versatility, this study employs hybrid sound coding based on operational
rate-distortion (RD) optimization principles. Applying this concept, a prototype coder has
been implemented with emphasis on (dynamic) adaptation to the input and to application
constraints. With this prototype, listening tests have been performed for different application
scenarios. The results demonstrate the versatility of the concept while keeping competitive
sound quality compared to dedicated state-of-the-art codecs.
TNO Identifier
525788
Source
Journal of the Audio Engineering Society, 56(October), pp. 787-809.
Pages
787-809
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