3 ms·
What's the resolution of the sensor? Does that mean it can record video at 16MP or something like that? I find that surprising given that all handset makers mak
by GuiA 10y ago
What's the resolution of the sensor? Does that mean it can record video at 16MP or something like that? I find that surprising given that all handset makers make a big deal of 4k recording.
- DougBTX 10y agoGuess: video recording produces large amounts of data while recording, so is disk write bound. "Instant capture" requires only a short, fixed duration, recording, so is only memory write bound. An alternative possibility, along the same lines, is that recording durable video is CPU bound due to compression, but a temp cache in RAM is small enough to have minimal compression requirements, so is not CPU bound.
- londons_explore 10y agoCamera HDR modes usually take 10 to 30 frames at full sensor resolution (RAW). That comes out to 16 Mpixels * 12 bits/pixel * 30 = 720Mbytes of RAM. Doable just about for a smartphone. If RAM is a concern, by using custom silicon which can process HDR very quickly, you can start to discard the first frames before the last is taken. The hardware necessary shares a lot of logic with video compression (calculating motion vectors etc.)