Trellis and codebook source coders-a performance comparison

Presents a comparison between two vector source coders: codebook and trellis coders. The comparison, based on simulations, is referred to three aspects: performance, i.e. the SNR achieved by the coders, the amount of computations and the memory requirements. The results show that under the constraint of same amount of computations, and in the range the parameters were tested, there exists a trellis coder with better performance than the codebook coder. When the constraint is put on the available memory, then, beyond a critical memory size, a trellis coder can be constructed, which exceeds the performance of the codebook with a lower computational load. Guidelines for setting the trellis parameters in order to design an efficient trellis coder are drawn