ADVANCED STEREOPHONIC ENCODING BASED ON THE COMBINATION OF ADAPTIVELY SELECTED LEFT / RIGHT OR MID / SIDE STEREOPHONIC ENCODING AND PARAMETRIC STEREOPHONY CODE

摘要

1. An encoder system for encoding a stereo signal into a signal (6) of a bit stream, wherein the encoder system contains: - downmix means (8) configured to generate a downmix signal and a residual signal based on the stereo signal; - means (9) parameter definitions configured to define one or more parameters (5) of parametric stereo coding; and - downstream perceptual coding means (2, 3) with respect to downmix means (8), wherein the perceptual coding means (2, 3) are configured to encode the downmix signal and the residual signal, while the perceptual means (2, 3) encodings are configured to select: - perceptual left / right encoding, or - perceptual middle / side coding. 2. The encoder system according to claim 1, characterized in that the means (2, 3) of perceptual encoding comprise: - conversion means (2) designed to perform the conversion based on the reduced signal and the residual signal, thus generating a pseudo left / right stereo signal; and - a perceptual encoder (3, 48) designed to encode a pseudo left / right stereo signal, while the perceptual encoder (3, 48) is configured to select - perceptual left / right encoding or - perceptual middle / side coding. 3. The encoder system according to claim 2, characterized in that the perceptual encoder (3) is configured to select between: - left / right encoding or - middle / side encoding, depending