More Website Templates @ Templates.com!

VideoAudioStandards ConversionCD/DVDMultimediaArtwork Templates

Variable Bit Rate

DVD specifies a Constant Linear Velocity (CLV) of 3.49 m/s, giving a transfer rate of 11.08 Mbits/sec--although 9.8 Mbits/sec is the top usable limit. But, MPEG-2 implements variable bit rate encoding (often called variable rate bitstream encoding), because it helps optimize quality in the program video stream while providing for maximum compression. Essentially, the sequences with high degree of motion are allowed higher data rates than the sequences with lower degrees of motion. It uses track buffers, intermittent reads, and even a complex ‘double pass’ process to achieve a high quality data stream within the allocated bandwidth (variable bit rate decoding for the video, the audio streams, and the subtitles). Obviously, the average bit rate in DVD-Video depends on the complexity of the video application, and can be anywhere up to the maximum of 9.8 Mbits/sec (higher rates up to the 11.08 Mbits/sec will not play in DVD-drives and players).  An average bit rate of 4.7 Mbits/sec is generally used along with 133 minutes of high quality video to describe DVD-Video performance from a single layer disc (capacity up to 4.7 gigabytes of data).

Click on a term below to learn more:

Aspect Ratio
AVI
Bandwidth
Beta SP
Blu-Ray
Byte
Capacity of CD-ROM
Capacity of DVD
CD
CD Business Card 
CD Duplication 
CD-R Duplication 
CD-Recordable
CD Replication
CD-R Replication
CD-ROM
Compression
CSS
DAT 
DLT and SDLT
Digital Asset Management
Digital Bin
Digitization
DVCAM
DVD
DVD Authoring 
DVD Duplication 
DVD Replication
DVD-R
DVD-Audio
Encoding
Frame Rate
Full-motion Video
HD DVD
High Definition DVD
Injection Molding
Jewel Case
JPEG
Macrovision
Mini CD
Mini DVD
MPEG
Multimedia
NTSC
PAL
Replication
ROM
SECAM
Variable Bit Rate

Call us Today!

  • Located 1 minute from the Strip.Phone: 702.895.9900 Fax: 702.895.9909 5850 South Polaris Ave. Suite 1200 Las Vegas, Nevada 89118