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  • válasz Visormail #3035 üzenetére

    Na eddig ennyit találtam:

    "Most commercial movies use 384 Kb/s for 6-channel surround, which adds up to 64 Kb/s per channel (although you can't really make this kind of comparison, because some of the data is shared by two or more channels)."

    "I have read that in 5.1 audio, you have 5 full channels and 1 channel at 1/3 the bit rate of the full channels. So, for example, in a 448 KBps file, that’s 5 channels at 84 KBps and the LFE channel at 28 KBps."

    "Generally, in a multichannel track, much like in a stereo track with a channel coupling method (like joint-stereo) being used, the bitrate allocated to each separate channel isn't just (overall bitrate)/(number of channels) because every channel is basically silent or very quiet most of the time, except when the primary sound sources are mapped to it. I can't vouch for AC3, though."

    [link] "An AC3 bit stream (and probably DTS as well) do not generally contain completely isolated channels. They are coupled and matrixed in various ways to limit the total amount of information that is transfered not to mention the .1 channel is bandwidth limited and handled differently. Additionally you haven't removed any of the format overhead from the bit rate number."

    Szóval teljesen kiszámíthatatlan, a megadott érték a teljes bitráta, minden csatornára összesen. Viszont egy csatornára nem a teljes érték/csatorna szám vonatkozik, mert sok adatot közösen használhat több csatorna is, így csak egyszer kell eltárolni, plusz egyéb eljárások, stb.

    Ryzen 7 5700G, 32 GB, RX6600XT, Windows 11

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