BLU-RAY DISC AND HD AUDIO
Blu-ray players can be configured to output uncompressed multi-channel PCM from any Blu-ray Disc. The SP32
will perform accurate D/A conversion on the multi-channel LPCM bit-stream.
• Blu-ray Disc is the only source of 5.1 or 7.1 channel HD audio currently available
• Most film soundtracks are mastered in 5.1-channel, 24-bit/48kHz PCM
• LPCM has the highest bit rate of all three lossless codecs*
• Currently 26% of Blu-ray discs carry a native multichannel PCM soundtrack
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• Most Blu-ray players can be set to decompress (unpack) Dolby and DTS HD audio formats and output
them as uncompressed multichannel PCM audio. Even if the Blu-ray Disc doesn’t carry the PCM
soundtrack, it’s still available from the player.
Blu-ray lossless audio formats*
Three are available currently: multichannel LPCM, Dolby TrueHD and DTS-HD Master Audio.
Multichannel LPCM – Linear Pulse Code Modulation: LPCM (often referred to as PCM) is used for the lossless
encoding of audio data in the compact disc Red Book standard; has been defined as a part of the DVD and Blu-
ray standards and is used by HDMI. On Blu-ray it offers a maximum bit rate of 27.648Mbps, up to 8 channels of
24bit/96kHz audio and up to six channels of 24bit/192kHz audio. Under the standard, players must have the
capability to support LPCM.
Dolby TrueHD: lossless encoding of up to 8 channels of audio, built on MLP technology. It offers a maximum bit
rate of 18.64Mbps, up to 8 channels of 24bit/96kHz audio and up to six channels of 24bit/192kHz audio. Under
the Blu-ray standard, support is optional.
DTS-HD Master Audio: lossless encoding of up to 8 channels of audio. It offers a maximum bit rate of 24.5Mbps,
up to 8 channels of 24bit/96kHz audio and up to six channels of 24bit/192kHz audio. Under the Blu-ray standard,
support is optional.
Blu-ray and LPCM
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Currently 84.36% of all Blu-ray Discs offer lossless multichannel audio, split this way: 13% LPCM, 51% DTS-
HD:MA, 20% TrueHD http://www.blu-raystats.com/Stats/Stats.php
SP32 Technical information
Video circuit
All analogue video inputs are converted to digital by the Texas Instruments 10bit TVP5146 video encoder, where
OSD from the Sanyo LC74763 OSD generator is added. The digital signal is then converted back to analogue by
the 10bit Cirrus CS4955 decoder. By performing all the video conversion in the digital domain using 10bit
processing we can maintain high quality video at all outputs and at all times regardless of the selected input
source. This is a significant improvement over the SP31, which could only switch component video and convert S-
video to composite, entirely in the analogue domain.
more…
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