Super Bit Mapping
Encyclopedia
Super Bit Mapping is a Noise Shaping
process, developed by Sony
for CD
mastering
.
Sony's SBM, a process that is intended to raise the standard of 16-Bit recording and playback quality. The basic theory is that when you record on an SBM enabled device through its 24-bit analog converters using SBM, the SBM processor filters the 24-bit audio to yield a final product that should sound better than normal 16-bit quality. SBM does this by weaving out the least significant 8-bit information into 16-bit filtered data.
Sony claims the reshaped noise pattern results in deeper bass and more dynamic midrange. According to Sony, by reorienting quantization noise to frequencies above 15,000 Hz - where human hearing is far less sensitive - the SBM process can achieve a result that is comparable to nearly 20-bit quality, yet you can still play the resultant 16-Bit data on any 16-bit recorder/player.
This processing takes place in dedicated hardware inside the recording device. A similar process is used in Sony's DSD to PCM conversion and is called SBM Direct.
Noise shaping
Noise shaping is a technique typically used in digital audio, image, and video processing, usually in combination with dithering, as part of the process of quantization or bit-depth reduction of a digital signal...
process, developed by Sony
Sony
, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....
for CD
Compact Disc
The Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...
mastering
Audio mastering
Mastering, a form of audio post-production, is the process of preparing and transferring recorded audio from a source containing the final mix to a data storage device ; the source from which all copies will be produced...
.
Sony's SBM, a process that is intended to raise the standard of 16-Bit recording and playback quality. The basic theory is that when you record on an SBM enabled device through its 24-bit analog converters using SBM, the SBM processor filters the 24-bit audio to yield a final product that should sound better than normal 16-bit quality. SBM does this by weaving out the least significant 8-bit information into 16-bit filtered data.
Sony claims the reshaped noise pattern results in deeper bass and more dynamic midrange. According to Sony, by reorienting quantization noise to frequencies above 15,000 Hz - where human hearing is far less sensitive - the SBM process can achieve a result that is comparable to nearly 20-bit quality, yet you can still play the resultant 16-Bit data on any 16-bit recorder/player.
This processing takes place in dedicated hardware inside the recording device. A similar process is used in Sony's DSD to PCM conversion and is called SBM Direct.
See also
- Extended Resolution Compact DiscExtended Resolution Compact DisceXtended Resolution Compact Disc is a mastering and manufacture process patented by JVC for producing redbook Compact Discs. It was first introduced in 1995....
(XRCD) - Noise ShapingNoise shapingNoise shaping is a technique typically used in digital audio, image, and video processing, usually in combination with dithering, as part of the process of quantization or bit-depth reduction of a digital signal...
(Noise Shaping)