Method and apparatus for encoding video by changing frame resolution

摘要

Encoding a video signal having a plurality of frames is described. Test frames in the sequence of test frames have an original resolution. A variance for each test frame in the sequence is calculated, as is a first peak signal-to-noise ratio (PSNR) for each test frame using the original resolution. A threshold is determined using the variances and first PSNRs. The threshold is provided to an encoder to select a frame resolution for a first frame of the plurality of frames, the frame resolution being one of the original resolution or a resolution different from the original resolution.

主权项

1. A method for encoding a video signal having a plurality of frames, each frame having a plurality of blocks, the method comprising:
calculating an inter-prediction variance for each test frame in a sequence of test frames, the test frames in the sequence of test frames having an original resolution; calculating a first peak signal-to-noise ratio (PSNR) for each test frame using the original resolution; determining an inter threshold using the inter-prediction variances and first PSNRs; and providing the inter threshold to an encoder to select a frame resolution for a first frame of the plurality of frames, the frame resolution being one of the original resolution or a resolution different from the original resolution.