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Stock market today: US stocks end higher to hit a 4-month winning streak as soft landing hopes rise ... S&P 500: 5,648.26, up 1.01% . Dow Jones Industrial Average: 41,563.08, up 0.55% (+228.03 ...
Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2/10 = 0.8, often notated as a percentage, 80%. For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes:
Usually, video compression additionally employs lossy compression techniques like quantization that reduce aspects of the source data that are (more or less) irrelevant to the human visual perception by exploiting perceptual features of human vision. For example, small differences in color are more difficult to perceive than are changes in ...
In many cases, files or data streams contain more information than is needed. For example, a picture may have more detail than the eye can distinguish when reproduced at the largest size intended; likewise, an audio file does not need a lot of fine detail during a very loud passage. Developing lossy compression techniques as closely matched to ...
In the last one week alone, the Russell 2000 has soared more than 11%, while the blue-chip Dow has gained more than 4%. The Nasdaq is up just 0.4% over the same period.
The Dow slid by 496 points, or 1.2%, after plunging more than 700 points earlier in the session. The S&P 500 lost 1.4% and the Nasdaq Composite fell 2.3%. US Treasury yields fell.
The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
The 30-stock index rose 243.63 points, or 0.59%, for a fresh record close of 41,335.05. Gains in Goldman Sachs , Intel and Visa helped lift the blue-chip average to a new high.
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related to: compress video size online more than 1 gb file dow stock forecast today