Variable Bitrate. A software function which detects the end to end bandwidth available for a streaming connection and automatically adjusts the output from the server accordingly.
a type of traffic that, when sent over a network, is tolerant of delays and changes in the amount of bandwidth it is allocated (e.g., data applications).
Variable Bitrate (VBR) encoding converts tracks at a variable rate, using higher bitrate encoding for complex portions and lower bitrate encoding for pauses in songs. In theory, VBR can result in better sounding, smaller files.
ariable it ate, is a term used intelecommunicatins and computing that relates to sound or video quality. As opposed to constant bit rate ( CBR), VBR files vary the amount of output data per time segment. VBR allows a higher bit rate (and therefore more storage space) to be allocated to the more complex segments of sound files while less space is allocated to less complex segments. The average of these rates is calculated to produce an average bit rate for the file that will represent its overall sound quality. mp3, wma, vorbis and AAC files can optionally be encoded with VBR. [more...
See definition for: variable bit rate (VBR) Windows Media file A file that contains audio, video, or script data. The content of the file is encoded with one of the Windows Media codecs.
A two-pass encoding process that analyzes and compresses movies to an optimal data rate; as opposed to a uniform data rate, VBR varies from second to second.
variable bit rate. An ATM service type that guarantees service based on average and peak traffic rates. VBR is used for traffic that requires little or no cell loss. It transmits data in spurts, or bursts, rather than in a continuous stream.
See definition for: variable bit rate (VBR) Windows Media Audio codec A codec used to compress and decompress audio streams.
Variable Bit Rate. VBR traffic is typically from bursty traffic sources and usually requires packetized bandwidth an demand for effective transport.
Variable bit rate. This allows DVD compression methods to use more or less compression according to the complexity of the picture.[ Back to the Top
Variable Bit Rate and Constant Bit Rate encoding explained. Read On
Variable Bit Rate. Data compression technique that produces an output data stream varying between fixed minimum and maximum rates, with bandwidth decreasing or increasing depending on the complexity of the fixed rate incoming data.
Variable Bit Rate. Data that can be read and processed at a volume that varies over time. A data compression technique that produces a data stream between a fixed minimum and maximum rate. A constant level of compression is generally maintained, with the required bandwidth increasing or decreasing depending on the complexity of the data being encoded.
VARIABLE BIT RATE. An ATM service category that is used for time-sensitive traffic suchas frame relay. Like CBR, VBR reserves a certain amount of bandwidth forthe connection. Unlike CBR, VBR can tolerate delays.
Variable Bit Rate - Traffic containing bursts but centered around an average bandwidth. VBR, divided into real-time (RT-VBR) and non-real-time (NRT-VBR) traffic requires the same service guarantees (that is delay, cell loss and timing) provided by CBR.
Variable bit rate. Variable Bit Rate adjusts the bit rate depending on the sound. For example, if there is silence in a song, the bit rate would decrease and if there is a full symphonic sound the bit rate would increase. VBR offers a higher sound quality at a smaller file size.
Variable Bit Rate, Abbreviated VBR. A connection-oriented Asynchronous Transfer Mode service for real-time applications for which minor data loss is acceptable, and for non-real-time VBR applications such as transaction processing.
A form of data delivery where bits are grouped irregularly and will vary with time. Compression that can be delivered at a variable bit rate can adapt to changing network bandwidths as well as to changing properties of a video such as the amount of motion.
variable bit rate. A way of coding video to maximize image quality over a connection's available bandwidth, usually provided by more recent codecs.
Variable Bit Rate. This format offers a much better way to stream or download music because of increased efficiency when the file was encoded. Variable bitrate files yield the best sound quality all the time rather than just setting a maximum.
An asynchronous transfer mode (ATM) quality of service category, defined by the ATM Forum. Both real-time variable bit rate (rt-VBR) and non-real-time variable bit rate (nrt-VBR) are defined. Apart from the traffic parameters for peak cell rate and sustainable cell rate (which defines the average bit rate required by the application), additional quality-of-service parameters — such as maximum cell transfer delay, cell delay variation and maximum burst size — must be agreed on. The typical application for which it is used is compressed voice and videoconferencing for rt-VBR, and response-time-sensitive data such as Systems Network Architecture (SNA) for nrt-VBR.
variable bit rate. Connection type for variable bit rate traffic, for example bursty data. See also CBR and ABR.
variable bit rate. A type of compression wherein certain audio sections are encoded at different bit rates so that complex sounds are encoded at a higher rate while simple sounds are encoded at a lower rate, as opposed to standard bit rate encoding. This means you get the best sound possible for a certain amount of disk space, but certain players occasionally have problems decoding VBR audio files.
Variable Bit Rate. Bit rate varies with time during the decoding of a compressed bitstream. One example is MPEG-2 for DVD-Video where bit rate changes according to compression requirements to keep the average bit rate low. VBR encoding offers better quality than constant bit rate (CBR) at lower data rates.
Variable Bit Rate. MPEG video compression where the amount of compression can be varied to allow for minimum degradation of the image in scenes that are harder to compress.
Variable Bit-rate encoding. (See bit-rate for a definition of this concept.) Basically, at parts of the song where a high bit-rate isn't needed to capture the full effect, the bit-rate is lowered to save file space. When a high bit-rate is needed, it's raised higher. Some older MP3 players (both software and hardware) can't handle VBR, but almost all players made within the last 3 years or so can. Check carefully when buying to ensure that yours supports this - many MP3s downloaded from the internet today are VBR encoded; when you make your own, you'll probably want to do it this way, too.
stands for ariable it ate, this encoding scheme is used when you wish to attain the highest quality audio files, and generally means larger file size.
Variable Bit Rate. A quality of service, for ATM networks, with two subcategories. First is Variable Bit Rate - Real Time (VBR-RT) - for timing sensitive connections such as video or voice. Second is Variable Bit Rate - NonReal Time (VBR-NRT_ - used for bursty or other non-time-sensitive transmissions. Both types guarantee minimum delay and cell loss.
Variable Bit Rate. A data transmission that can be represented by an irregular grouping of bits or cell payloads followed by unused bits or cell payloads.
Variable Bit Rate. An ATM traffic type that is equivalent to guaranteed traffic type. It is defined by its Peak Rate, Sustainable Rate, and Burst Tolerance.
A more efficient method (as opposed to FBR) of encoding a digital audio or video stream in order to reduce it’s subsequent file size. The bit rate of an encoded audio/video file is the number of bits (binary digits - 0s or 1s) that are required to store 1 second of program. In audio, an MP3 file at 128kbps requires 128,000 (ish!) bits to store 1 second of audio. Using psychoacoustic algorithms, a Variable Bit Rate encoder varys the bit rate depending on how much information is needed to only store the most audible portion of the signal from moment to moment. Since silence doesn’t contain very much information, a VBR encoder just stores a code meaning “'x' seconds of silence” rather than storing thousands of zeros. In video, a VBR encoder uses algorithms which only store the changes from frame to frame rather than the entire video scene.
Variable Bit Rate (Rata de Bits Variable)
(Variable Bit Rate): This refers to the ability to maintain a quality broadcast without interruption from fluctuating bandwidth or other network load problems.
Variable Bit Rate. A type of telecommunications service characterized by a service bit rate specified by statistically expressed parameters that allow the bit rate to vary within defined limits.
An ATM Forum defined service category which supports variable bit rate data traffic with average and peak traffic parameters.
variable bit rate. encoding process where the codec makes the choice for how many bits are used on each segment of music. More complex segments get more bits. VBR was created with the goal of efficient use of file sizes.
Variable Bit Rate. A type of RealVideo encoding that enables RealPlayer to play different parts of the video at different bit rates, even though the video is streamed at a constant rate. Contrast to CBR.
Variable Bit Rate. Applications that produce traffic of varying bit rates, like common LAN applications, which produce varying throughput rates.
Variable bit rate. Variable bit rate specifies the sound quality level but allows the bit rate to fluctuate. During complex passages, VBR uses a higher-than-average bit rate but during simple passages uses a lower-than-average bit rate. VBRs save space without typically sounding worse.
Variable Bit Rate. Variable bit rate specifies the sound quality level but allows the bit rate to fluctuate. During complex passages, VBR uses a higher-than-average bit rate but during simple passages uses a lower-than-average bit rate. The result is that VBR produces an overall higher, more consistent sound quality compared to CBR at similar bit rates. See also: Constant Bit Rate (CBR).
(Variable Bit rate) A method of compressing audio or video that examines the material to be compressed in two passes. On the first round, passages that are "difficult" or "easy" to compress are identified. On the second pass, the movie is compressed in a way that allows a higher bit rate for the difficult passages and a lower bit rate for the easier passages while maintaining a consistent bitrate overall. Passages like "talking head" interviews are considered easy to compress because the difference between any two frames is nominal. The entire frame doesn't need to be redrawn, only the part that's changed. If the same interview took place in a moving car, it would become difficult to compress. The constantly changing background forces the entire screen to be repainted in every frame.
Variable Bit Rate. Generic expression for an changing bitrates for data communications, depening on the need for more or less bandwidth. The opposite is CBR (Constant Bit Rate).
variable bit rate. QOS class defined by the ATM Forum for ATM networks. VBR is subdivided into a real time (RT) class and non-real time (NRT) class. VBR (RT) is used for connections in which there is a fixed timing relationship between samples. VBR (NRT) is used for connections in which there is no fixed timing relationship between samples, but that still need a guaranteed QOS. Compare with ABR (available bit rate), CBR, and UBR.
An ATM service class for network traffic that is typically from bursty data transfer applications, such as client/server and LAN to LAN interconnection. VBR offers guaranteed service delivery. VBR-RT (real-time) is designed for real-time voice and videoconferencing applications, and VBR-NRT (nonreal-time) is for mission-critical data applications.
Variable Bit Rate. A bitrate that changes based on the amount of data being processed. A static image will have a low bit rate, while a scene with a lot of fast-moving action will have a high bit rate; VBR allows the bit rate to change as needed. See CBR (Constant Bit Rate).
Variable bit rate. For ATM1 and ATM2 intelligent queuing (IQ) interfaces, data that is serviced at a varied rate within defined limits. VBR traffic adds the ability to statistically oversubscribe user traffic.