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USB-2.0 is up to 480mbps which I believe is several multiples higher bit rate than even the highest quality 4k Blu-ray disks. I don't see why "heavy" compressio
by hamandcheese 2y ago
USB-2.0 is up to 480mbps which I believe is several multiples higher bit rate than even the highest quality 4k Blu-ray disks. I don't see why "heavy" compression would be required.
Edit: doing some quick math, it seems like transmitting a raw/uncompressed signal at even 720p60 far exceeds the bandwidth of USB-2.
So if the goal is to shift all transcoding to the CPU, MIPI does make sense.
- nrp 2y agoCameras use isochronous mode, which maxes out at less than half the theoretical max USB 2.0 bandwidth, and they use MJPEG compression on each frame rather than something like H.265 that can compress much more by leveraging P/B-frames.