What is statistical multiplexing ?
The “progressive” explanation: In the simplest coded bitstream, a PCM (Pulse Coded Modulated) digital signal, all samples have an equal number of bits. Bit distribution in a PCM image sequence is therefore not only uniform within a picture, (bits distributed along zero dimensions), but is also uniform across the full sequence of pictures. Audio coding algorithms such as MPEG-1’s Layer I and II are capable of distributing bits over a one dimensional space, spanned by a “frame.” In layer II, for example, an audio channel coded at a bitrate of 128 bits/sec and sample rate of 44.1 Khz will have frames (which consist of 1152 subband coefficients each) coded with approximately 334 bits. Some subbands will receive more bits than others. In block-based still image compression methods which employ 2-D transform coding methods, bits are distributed over a 2 dimensional space (horizontal and vertical) within the block. Further, blocks throughout the picture may contain a varying number of bits as
Our Statistical Multiplexing technology dynamically allocates bandwidth to the channels that need it most. SIRIUS is the only satellite radio provider that does this. What it means for you is better overall sound quality and superior sound resolution, so you hear the music/programming the way it was intended.
