bit rate


Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.
Related to bit rate: baud rate

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.

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.

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.
References in periodicals archive ?
The client selects the quality that has a lower bit rate than the measured bandwidth to minimize playback interruptions and utilize bandwidth efficiently.
Notations and their Meaning Notation Meaning Bit rate AMR codec bit rate t, t-1 Current and Previous time of request Nrb Number of RBs Nue Number of UEs Tot RB Total Number of Available RBs Due Demand of UE PD Packetization Delay (20ms) OH Overhead in Bytes [CQI.sub.N,P] Channel Quality Indicator in 'Nth' Interval and 'Pth' RB Table 2.
When the subcarriers are not allocated to the users at the ratio required by them, there will be a decrease at the bit error rates on the receiver side, but at the same time the user data bit rates will also decrease.
Receiver sensitivity for 4 user and 6 users AP-DCDM systems each with 20Gbps Bit rate are shown in Fig.
The bit-rate comparator decides the type of coding bit rate. We define the coding bit rate to be greater than and equal to 0.5 bpp as the type of high bit rate (type 1) and less than 0.5 bpp as the type of low bit rate (type 0).
where [r.sub.i] denotes ith subband allocated bit rate, R denotes total bit rate, [I.sub.i] denotes ith subband of the amount of information, [J.sub.j] denotes the number of ith subbands of the posttransform blocks, and [f.sup.b*.sub.j,i] is ith subband of jth best posttransform selection.
Therefore, the bit rate increases with the increase of the injected current.
Thus, we can evaluate the power consumption per subscriber in relation to the access bit rate offered to a subscriber.
evident from the graphs that SVC spatial scalability is supported at the price of raise in the bit rate to some extent but in this way two bit streams are created of the two desired resolutions (4CIF and CIF) varying in coding efficiency and visual quality.
Buffering the data prior to transmission in a constant bit rate (CBR) encoder is an added tradeoff because a larger buffer size implies a larger delay.
This means that Alice and Bob' bases of almost all photons are the same, so the bit rate of protocol could be doubled.
MEDIUM BANDWIDTH--Target encoding at 300Kbps: VIDEO SIZE: 320x240; Frame rate: 15 fps; Bit rate: 200Kbps