bit rate

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bit rate

[′bit ‚rāt]
(communications)
Quantity, per unit time, of binary digits (or pulses representing them) which will pass a given point on a communications line or channel in a continuous stream.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

bit rate

(communications, digital signal processing)
(Or "bitrate") A data rate expressed in bits per second. This is a similar to baud but the latter is more applicable to channels with more than two states.

The common units of bit rate are kilobits per second (Kbps) and megabits per second (Mbps). In data rates, the multipliers "k", "M", etc. stand for powers of 1000 not powers of 1024.

The term is also commonly used when discussing digital sampling and sample rates. For example, the MP3 audio compaction algorithm is often set to ouput files with a bitrate of 120 kbps. This means that the file contains an average of 120 kilobits for each second of audio (900 KB per minute). This compares with CD audio which is encoded at 44100 16-bit stereo samples per second or 1408 kbps.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

bit rate

(1) See data rate.

(2) The speed that digital audio and video files are encoded (compressed), measured in kilobits (Kb) and megabits (Mb) per second. For example, MP3 audio files can be created with bit rates from 16 Kbps to 320 Kbps, with 128 Kbps being fairly common. Video formats also run the gamut, from as little as 10 Mbps for preview frames to 400 Mbps and higher for HD.

The higher the bit rate, the less compression and the better the audio or video quality. It is sometimes extremely difficult to hear or see the difference unless comparing content with bit rates that are far apart. See space/time.
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References in periodicals archive ?
These thresholds are calculated using the difference between the bit rates of each video quality.
Since the CoaXPress 2.0 standard is backwards-compatible, this frame grabber card can support CoaXPress interface bit rates of 1.25Gb/s, 3.125Gb/s and 6.25Gb/s.
Thus the subcarriers are distributed to the users fairly, according to their need and both the bit error rates are decreased and the user bit rates are increased.
Solutions that can maximise video quality per encoded bit rate are important competitive features for content distributors who value visual quality while being sensitive to bandwidth availability on the network.
However, the posttransforms destroy the zerotree structure; the PSNR using BPE is 0.2 dB less than using DWT and even worse at high bit rates. A basis vector ordering approach has been used.
In our algorithm, the dictionary has two bases, which work at high bit rate and low bit rate.
In this paper, sleep modes are also considered, but to the best of our knowledge, our approach with a two layer network where the first layer provides an always-on network with a low bit rate and a second layer with sleeping base stations that provide higher bit rates when needed, has never been investigated before.
The decoded video by these subset bit streams is analogous to that achieved using the H.264/AVC (Advanced Video Coding) standard in fidelity (Schwarz and Wien, 2008) SVC is beneficial than simulcast, that permits concurrent transmission of single-layer bit streams with dissimilar bit rates and picture sizes, depending upon the application.
As a result, services that provide high-quality video at low bit rates are in demand.
The solution offers algorithms that generate high output video quality at low bit rates, enabling OEMs to provide innovative video processing solutions to support new revenue generating opportunities for operators.