Very low bit rate speech coding based on joint segmentation and variable length segment quantizer

Low Bit - Rate Speech Coding Using Joint Segmentation - Quantization

Variable Frame Rate for Very Low Bit-Rate Video Coding

Motion description of objects time evolution is often bit-rate wasting even if computed at a low fixed ffame rate. Bit-rate reduction can be achieved taking advantage of the inactivity periods: in such time intervals there is no need for motion coding, as an accurate description of the scene can be obtained only considering the frame diflerence information. We propose to estimate the motion bet...

Very low bit-rate video coding based on matching pursuits

We present a video compression algorithm which performs well on generic sequences at very low bit rates. This algorithm was the basis for a submission to the November 1995 MPEG-4 subjective tests. The main novelty of the algorithm is a matching-pursuit based motion residual coder. The method uses an inner-product search to decompose motion residual signals on an overcomplete dictionary of separ...

Low-bit-rate Speech Coding

Low-bit-rate speech coding, at rates below 4 kb/s, is needed for both communication and voice storage applications. At such low rates, full encoding of the speech waveform is not possible; therefore, low-rate coders rely instead on parametric models to represent only the most perceptually-relevant aspects of speech. While there are a number of different approaches for this modeling, all can be ...

A Very Low Bit-Rate Video Coding System based on Optical Flow and Region Segmentation Algorithms

Digitalized video and audio system has become the trend of the progress in multimedia, because it provides great performance in quality and feasibility of processing. However, as the huge amount of information is needed while the bandwidth is limitted, data compression plays an important role in the system. Say, for a 176 144 monochromic sequence with 10 frames/sec frame rate, the bandwidth is ...