![]() ![]() ![]() ![]() The switching may also introduce significant perceptual quality degradations. The switching systems currently achieve the best perceptual quality, but require a lot of resources due to the need of two independent codecs and an additional switching decision. For optimal coding at low bitrates, recently standardized systems switch between speech and general audio codecs. The most successful speech codecs are based on adaptive linear prediction (LP) and time domain coding of the prediction residual, while the most successful general audio codecs are based on the modified discrete cosine transform (MDCT). The increasing need for efficient transmission of speech and other audio signals has led to development of specialized codecs. ![]()
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