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What is the benefit of adding compression here? Does that mean that the bandwidth might or might not be sufficient depending on which pictures are being shown o
by someplaceguy 3y ago
What is the benefit of adding compression here? Does that mean that the bandwidth might or might not be sufficient depending on which pictures are being shown on the screen?
If so, that doesn't seem very reliable and if not, what's the point of compression?
- chx 3y ago> DSC is most often used in a Constant Bit Rate (CBR) mode, where the number of coded bits generated for a slice is always a constant that is generally equal to the bit rate multiplied by the number of pixels within the slice https://vesa.org/wp-content/uploads/2020/08/VESA-DSC-Source-Device-Guidelines-r1.0.pdf https://vesa.org/wp-content/uploads/2020/08/VESA-DSC-Source-...
- someplaceguy 3y agoAh, so basically this is typically used as lossy compression with a constant bit rate, which makes the bandwidth usage predictable/constant but depending on the pictures being shown (and the noise level?), it can lead to some visual degradation (which they say is usually imperceptible). That's interesting and surprising to me.
- chx 3y agoIf you consider how ~1:18 is considered visually lossless for x.264, a compression of 1:3 is very very likely can be achieved visually lossless indeed.