Compression Ratio

The ratio of the size of an uncompressed file to a compressed file, e.g., with a 10:1 compression ratio, a 1 MB file can be compressed to 100 KB.

Amount that the air-fuel mixture is compressed as the piston reaches the top of the bore. The higher the compression, the more horsepower produced.

In signal compression, the ratio of the dynamic range of compressor input signals to the dynamic range of the compressor output signals. Note: The compression ratio is usually expressed in dB. For example, a 40-dB input range compressed to a 30-dB output range would be equivalent to a 10-dB compression. 2. In digital facsimile, the ratio of the total pels scanned for the object to the total encoded bits sent for picture information. 3. The ratio of the gain of a device at a low power level to the gain at some higher level. Note: The compression ratio is usually expressed in dB.