I have noticed that most japanese BluRays with anime have stereo PCM track EVEN if its a recent movie with DTS-MA 5.1 track. Why do they bother with uncompressed stereo if they have uncompressed surround? Is DTS-MA (or even DTS core) worst in stereo downmix or is it legacy thing with AVR with Pro Logic and DD only with no DTS decoder?
Stereo PCM on BluRays
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Stereo and multichannel tracks if well-made will be significantly different from each other and there may well be be no algorithmic or automated way to transform one into the other. Optimally, they will be hand-crafted separately.
This is pretty obvious for stereo->multichannel, but it can be equally true for multichannel->stereo. Both kinds of track need to be on a quality production.
Stereo and multichannel tracks if well-made will be significantly different from each other and there may well be be no algorithmic or automated way to transform one into the other. Optimally, they will be hand-crafted separately.
This is pretty obvious for stereo->multichannel, but it can be equally true for multichannel->stereo. Both kinds of track need to be on a quality production.
DTS HD MA has the metadata and ability to downmix to 2.0. To do that though, you need to recreate the 2.0 mix from your multi-channel mix. I am not into Anime but for theatrical releases, that usually requires talent approval. Likely the stereo mix they already have was created for TV and such and is pre-approved so they rather use that than to create yet another one from the downmix.
Well i tried both tracks, and i really didnt like how stereo sounded comprered to surround, so i dont know that the big thing is about stereo only track... oh well, i think that if they have a space on disc they can throw in it anyway...
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It could be useful for someone who has a two channel system instead of a surround system. For many years, I used a two channel system with my TV and movies, because that is what I had for music and did not have the money to buy a decent surround system (which used to cost more than it does now). Most likely, if both are well-made, one will tend to prefer the surround mix on a surround system. On the other hand, if one is bungled horribly, and the other one is not, then the other one will be best. But I doubt you will run into very many examples of that.
It could be useful for someone who has a two channel system instead of a surround system. For many years, I used a two channel system with my TV and movies, because that is what I had for music and did not have the money to buy a decent surround system (which used to cost more than it does now). Most likely, if both are well-made, one will tend to prefer the surround mix on a surround system. On the other hand, if one is bungled horribly, and the other one is not, then the other one will be best. But I doubt you will run into very many examples of that.
Yes i meant 2 channels vs 6 channels... I also trayed downmix DTS-MA with headphones and switching between them... PCM was less pounchy i guess and voice more blended with rest.... typical for DTS i think... dunno maybe it have its rights to be seperate...
PCM is codec like everything else... is it DPCM, LPCM, ADPCM..... with its bitrate (transport stream dependent), algorithms and so on..... its just isnt very efficient (low processing power need) so it can be very easy compressed (which require some processing power that wasnt available in 1980s) like either other digital data....
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^^ You seem to be confusing two different processes. PCM (Pulse Code Modulation) is a method of digitally representing an analog signal. Codec (COmpression DECompression) is a method of reducing the size of a digital data file for storage and transmission.
PCM is the fundamental type of digital audio used in entertainment. It's used on CDs. It's how movies are mastered. And it's the digital format that players and receivers process to produce sound. But, multichannel PCM soundtracks are quite large. So, studios use codecs such as DD 5.1, DTS, and their lossless cousins to save space on discs. PCM is fed into an encoder to reduce the size and then is decoded to expand it back into PCM.
PCM is the fundamental type of digital audio used in entertainment. It's used on CDs. It's how movies are mastered. And it's the digital format that players and receivers process to produce sound. But, multichannel PCM soundtracks are quite large. So, studios use codecs such as DD 5.1, DTS, and their lossless cousins to save space on discs. PCM is fed into an encoder to reduce the size and then is decoded to expand it back into PCM.
Now you are confusing codec with compressor. Lossless "codecs" act like zip compressors, they docompress on the fly the archive. Yes, TrueHD contains stream encoded as PCM but is compressed like FLAC for example. Industry could fit double the PCM encoded music on CD. Or same lenght but with highier quality like 48/24bit) DTS-MA contain lossy core with difference data from original PCM encoded file.
You can use music from MP3 file in movie, encoded it in PCM, a then compressed it with TrueHD.... It still "uncompressed"?
You can use music from MP3 file in movie, encoded it in PCM, a then compressed it with TrueHD.... It still "uncompressed"?
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What? Codec vs. compressor. I have no idea what that means.
As for the quality of PCM, it can be very high or very low. Depends on the source. But, it does not involve data compression, which is what several posters here have been trying to explain to you.
As for the quality of PCM, it can be very high or very low. Depends on the source. But, it does not involve data compression, which is what several posters here have been trying to explain to you.
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