The paper describes a multi-layer video coder based on spatiotemporal scalability and data partitioning. The coder consists of two parts: a low-resolution coder and full-resolution coder. The first one encodes pictures with reduced spatial and temporal resolution. The data are partitioned into some base layers with fine granularity. The full-resolution encoder exploits interpolated images from ...

The following three speech coders are implemented for a bitrate of 9.6 kbitsfs 1) Sub-band coder, 2) Residual Excited Linear Predictive (RELP) coder, and 3) Multi-Pulse Excited linear predictive (MPE) coder. Performance of these coders is evaluated for speech corrupted by additive white noise. Evaluation of speech coders is done both subjectively and objectively. The MPE coder is found to give ...

A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP) achieves a delay of about 10 ms, by exploiting time-domain correlations with a twostage linear prediction scheme. A low-order forwardadaptive LP stage models coarse shape, and a highorder backward-adaptive LP stage models ne structure of the input spectrum. A conditional pitch prediction method improves the performance of ...

Problem statement: In tonal-language speech, since tone plays important role not only on the naturalness and also the intelligibility of the speech, it must be treated appropriately in a speech coder algorithm. Approach: This study proposes an analytical study of the technique of High Pitch Delay Resolutions (HPDR) applied to the adaptive codebook of core coder of Multi-Pulse based Code Excited...

In this paper, a novel minimumnoise structure is introduced for ladder-based biorthogonal lter banks. The proposed MInimum Noise LAdder-based Biorthogornal (MINLAB) coder ensures that the noise gain of the quantizers is unity, even though the system is not orthonormal. The coding gain of the optimal MINLAB coder is always greater than unity. For both the AR(1) and MA(1) processes, the MINLAB co...