Compression Ratio in a sentence

The data compression ratio is analogous to the physical compression ratio used to measure physical compression of substances.

Compression ratio The compression ratio (that is, the size of the compressed file compared to that of the uncompressed file) of lossy video codecs is nearly always far superior to that of the audio and still-image equivalents.

Variable Compression Ratio (VCR) engines Because cylinder-bore diameter, piston-stroke length and combustion-chamber volume are almost always constant, the compression ratio for a given engine is almost always constant, until engine wear takes its toll.

An engine with high static compression ratio and late intake valve closure will have a DCR similar to an engine with lower compression but earlier intake valve closure.

Combined gas law As well as the high level of compression allowing combustion to take place without a separate ignition system, a high compression ratio greatly increases the engine's efficiency.

Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal.

Development in lossless compression formats aims to reduce processing time while maintaining a good compression ratio.

It had a comparatively low compression ratio, so that the temperature of the air compressed in the combustion chamber at the end of the compression stroke was not high enough to initiate combustion.

Lossless vs. lossy Lossless compression of digitized data such as video, digitized film, and audio preserves all the information, but it does not generally achieve compression ratio much better than 2:1 because of the intrinsic entropy of the data.

Shannon's experiments with human predictors show an information rate between 0.6 and 1.3 bits per character in English; citation the PPM compression algorithm can achieve a compression ratio of 1.5 bits per character in English text.

The elements in the quantization matrix control the compression ratio, with larger values producing greater compression.

Typical compression ratios Gasoline (petrol) engine The compression ratio in a gasoline (petrol)-powered engine will usually not be much higher than 10:1 due to potential engine knocking (detonation) and not lower than 6:1.

Also, increased mechanical efficiency is created by a higher compression ratio through the concomitant higher expansion ratio on the power stroke, which is by far the greater effect.

An Atkinson cycle engine uses the timing of the valve events to produce the benefits of a high expansion ratio without the disadvantages, chiefly detonation, of a high compression ratio.

Engines with a higher compression ratio have a worse surface-to-volume ratio.

For The static compression ratio of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity.

Indirect injected engines place the injector in a pre-combustion chamber in the head which due to thermal losses generally require a "glow plug" to start and very high compression ratio, usually in the range of 21:1 to 23:1 ratio.

Maximum thermal efficiency The maximum thermal efficiency of a Diesel cycle is dependent on the compression ratio and the cut-off ratio.

As you give an engine of a certain displacement a higher compression ratio, you effectively shift the P-V diagram up and to the left, and increase heat input (Qh in the diagram) more so than heat loss (Ql).

Beneath the hood is the world’s first turbocharged variable compression ratio engine that balances performance and efficiency.