Originally Posted by Sky007FR
Hi, i have a VSX921 and a BDP440, PQLS is working only in LPCM mode but not when bitstreaming unfortunately...
Thx for your reply
I have been doing some reading concerning bitstream versus LPCM.
Think we can not "hear" the differents between LPCM and bitstream from a BD player.
For what i read is that bitstream is a signal with a buildin clock and LPCM has not, but there is were PQLS comes into play and corrects for the "missing" clock data.
So i think bitstream will not be any better then LPCM in the case of LPCM working with PQLS.
I also read when a brand uses bad/cheap audio chips/decoders it will do more harm then good to a bitstream signal and using LPCM will be a better option.
So we have a choice, use bitstream and let the receiver do the decoding or use LPCM and let PQLS do its trick.........
(at least if we have that option on the BD player, i do not know yet, still waiting for the LX55 to arrive)
Just now found this info:Dolby TrueHD and DTS-HD MA compress the LPCM audio signals without any loss of original data in order to save space on a disc. When the saved signals are decoded and decompressed, we will get LPCM signals again.
If the disc player decompresses and decodes the compressed audio, it will send the LPCM signals to the receiver. The receiver will then covert the LPCM signals from digital to analog for playback through the speakers. Alternatively, the compressed Dolby TrueHD or DTS HD MA signals can be sent by the player in raw digital format to the receiver (the older PS3 cannot do this) for decoding to LPCM and digital-to-analog conversion. This process is called Raw Bitstream Transport, High Bit Rate Audio Streaming, or Direct Digital Audio Mode, depending on the manufacturer. Bitstreaming is the preferred choice of many critical listeners.
If the player decodes the high resolution audio to PCM, any version of HDMI can transmit the signal to the receiver. If the player sends the signal in native digital Bitstreams to the receiver, HDMI terminals on both the disc player and the receiver must be version 1.3, and the receiver must have the ability to decode high resolution audio codecs.
So think letting the BD player send LPCM with PQLS will be a more then good option.
In some BD sound tests the "experts" preverd LPCM over bitstream where the info above suggests bitstream
Think its the best to let your and my ears make the choise, but i will put my money on LPCM with PQLS.....