437 research outputs found
Television transmission system with differential encoding of transform coefficients
No full textIn a television transmission system for digital picture signals each picture is divided into sub-pictures of N x N picture elements for the purpose of limiting the bit rate. Each sub-picture is subjected to a two-dimensional forward transform to determine coefficients. These coefficients are converted into a series of serially occurring coefficients in which the AC coefficients in this series are arranged in such a way that the magnitude variation of these AC coefficients in the series is monotonous. The magnitudes of the AC coefficients thus arranged are subjected to a differential encoding so that the difference between the magnitudes of two successive AC coefficients is transmitted instead of the magnitude of the AC coefficients themselves
System for the transmission of video signals with adaptive code word allocation, and also a transmitter and a receiver suitable for the system
No full textIn a system for the transmission of video signals digitized by means of differential pulse code modulation, the constituent signal words are submitted to a variable-length coding operation. A further bit rate reduction is then realized in that the allocation of the code words to the signal words is periodically adapted to the local statistics of the video signal
System for the transmission of video signals with adaptive code word allocation, and also a transmitter and a receiver suitable for the system
No full textIn a system for the transmission of video signals digitized by means of differential pulse code modulation, the constituent signal words are submitted to a variable-length coding operation. A further bit rate reduction is then realized in that the allocation of the code words to the signal words is periodically adapted to the local statistics of the video signal
Embedded video streaming technology (MPEG-4) and the Internet : proceedings of a one-day workshop, Eindhoven, December 20, 2001
No full text
- …
