Lines Matching refs:floor
179 floor and residue vectors within a mapping. The submap functions as a
180 last layer of indirection such that specific special floor or residue
183 the proper floor and residue instance number to use for decoding that
184 submap's spectral floor and spectral residue vectors.
192 apply a full range floor and residue encoding to channels 0 through 4,
195 of a full-range floor) and channel 5 belongs to submap 1, which uses a
201 Vorbis encodes a spectral 'floor' vector for each PCM channel. This
204 whitening filter. It is named a 'floor' because the Xiph.Org
208 A floor encoding may be of two types. Floor 0 uses a packed LSP
213 encoding/decoding. However, floor type 1 provides more stable
216 less expensive to decode than floor 0.
220 use of floor 0.
222 The values coded/decoded by a floor are both compactly formatted and
223 make use of entropy coding to save space. For this reason, a floor
226 and each floor instance may choose from any and all available
232 once the floor curve has been subtracted out. In simplest terms, it
236 configured by residue instance. As with the floor components, the
297 \item decode floor
300 \item generate floor curve from decoded floor data
301 \item compute dot product of floor and residue, producing audio spectrum vector
389 \paragraph{floor decode}
390 Each floor is encoded/decoded in channel order, however each floor
391 belongs to a 'submap' that specifies which floor configuration to
432 \paragraph{generate floor curve}
434 The decoder may choose to generate the floor curve at any appropriate
435 time. It is reasonable to generate the output curve when the floor
441 Both floor 0 and floor 1 generate a linear-range, linear-domain output
447 \paragraph{compute floor/residue dot product}
450 multiplies the floor curve and residue vectors element by element,
457 fixed-point representation for floor and residue and direct
462 However, floor vector values can span \~{}140dB (\~{}24 bits unsigned), and
465 residue vector to represent full scale if the floor is nailed to
467 to reach full scale if the floor is nailed at 0dB, it must be able to