downsample


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downsample

(1) To make a digital audio signal smaller by lowering its sampling rate or sample size (bits per sample). Downsampling is done to decrease the bit rate when transmitting over a limited bandwidth or to convert to a more limited audio format. Contrast with upsample. See sampling.

(2) To decrease the color depth of a digital image; for example, from 24 bits to 16 bits per pixel. Contrast with upsample. See color depth and downconvert.
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References in periodicals archive ?
(2) blur using isotropic 3 x 3 Gaussian PSF with standard deviation 1; (3) downsample the row and column of the image by factor of [square root of P] = 2; (4) add independent identically distributed (i.i.d.) Gaussian noise of SNR (signal noise ratio): 10 dB, 15 dB, 20 dB, 25 dB, and 30 dB; SNR is defined as
The max pooling of size 8 x 8 and the stride of 8 are taken to downsample the convolved maps to a size 7 x 7.
One easy, but effective approach uses a minimum pixel value filter for the downsample process which ensures a big compression rate, when used with Huffman coding for compression.
For further verifying the effect of feature dimension to recognition accuracy, we downsample the face images to 10 x 10, 20 x 25, 25 x 30, 35 x 40 and 40 x 50, respectively, which correspond to feature dimension of 100, 500, 750, 1400 and 2000.
Adam Clairmont, studio manager at Overit, agrees, adding that online radio/streaming services degrade an artist's work because they downsample audio tracks to create conveniently small files that can be smoothly streamed.
"I saw a world in which everyone was free to downsample any game, unbound by the restrictions of their monitor or display driver.
The recognition rates when the ear is occluded using Gabor orientation + NSRC, Downsample + SRC, Random ear + SRC, and Eigenear + SRC are illustrated in Figure 9.
According to the RSSI measuring frequency, we downsample the estimated real VO routing path.
The second step is to downsample the right CCD image to be matched and target area template image extracted from the left CCD image.