A 4800 bps CELP vocoder with an improved excitation

The Stochastic or Code Excited Linear Predictive Coder (CELP) is among the promising candidates for producing good quality speech at low bit rates. However, the speech quality produced suffers from perceived roughness. Many researchers have used pole-zero postfilters to mask the roughness at the output of the synthesis filter. Although the postfilters are effective in masking the noise at low bit rates, they produce spectral distortions. It is proposed that speech can be improved by introducing two modifications to the fixed stochastic codebook. In the first modification, the stochastic codebook is used only when the long term correlations are low. Otherwise, a pulse like codebook is selected. In the second modification, the selected codebook output is weighted using an adaptive spectral shaping procedure. These two modifications were incorporated in a 4800 bps CELP coder and have resulted in a perceptually improved vocoded speech

Women, Occupation, Collective Loss and Support: the Experience of “from a Bereaved Woman to Another”

This study derives its force from experiences of Palestinian women, occupation and loss project that aims at describing and understanding the role of holistic intervention based on the mutual support approach “from a bereaved woman to another.” The qualitative method has been utilized, with a view to reaching an integrated description, analysis and explanation of the experience that has been documented in details, through using special documentation forms. The results reveal that changes have taken place to bereaved women and supportive bereaved ones, as a result of participation in support and through training meetings. The findings demonstrate that women have succeeded in expressing the memory and identity of loss and in being conscious of the Palestinian components. The experience of bereaved woman-to-bereaved woman, has proved effective and promising in the alleviation of the intensity of direct bereaved disorders. The study concludes that there is a dire need to develop this experience and provide it with societal and political legitimacy. It is expected that gender roles will be integrated and taken into account in describing, analyzing, explaining and evaluating issues of women and collective loss