Hybrid transform coder for low bit rate speech coding
نویسندگان
چکیده
منابع مشابه
Hybrid Dct/wavelet I-frame Coding for Efficient H.263+ Rate Control at Low Bit Rates
At low bit rates, the bit budget for I-frame coding in H.263+ can be too high to be practical. A hybrid DCT/wavelet transform based I-frame coding is proposed in this work as a solution to the rate control problem. This new coder is compatible with the H.263+ bit stream syntax, and aims at an R-D optimized performance with a reasonable amount of computational complexity. By employing fast estim...
متن کاملH . 263 + I - frame Coding with a Hybrid DCT / Wavelet Transform
At low bit rates, the bit budget for I-frame coding in H.263+ can be too high to be practical. A hybrid DCT/wavelet transform based I-frame coding is proposed in this work as a solution to the rate control problem. This new coder is compatible with the H.263+ bit stream syntax, and aims at an R-D optimized performance with a reasonable amount of computational complexity. By employing fast estim...
متن کاملH . 263 + I - frame Coding with a Hybrid DCT /
At low bit rates, the bit budget for I-frame coding in H.263+ can be too high to be practical. A hybrid DCT/wavelet transform based I-frame coding is proposed in this work as a solution to the rate control problem. This new coder is compatible with the H.263+ bit stream syntax, and aims at an R-D optimized performance with a reasonable amount of computational complexity. By employing fast estim...
متن کاملFrequency Domain Coding of Speech
Frequency domain techniques for speech coding have recently received considerable attention. The basic concept of these methods is to divide the speech into frequency components by a filter bank (sub-band coding), or by a suitable transform (transform coding), and then encode them using adaptive PCM. Three basic factors are involved in the design of these coders: 1) the type of the filter bank ...
متن کاملCombined harmonic and waveform coding of speech at low bit rates
In this paper we present a new approach for speech coding, which combines frequency-domain harmonic coding for periodic and \noise like" unvoiced segments of speech with a time-domain waveform coder for transition signals. This hybrid coder requires special handling of the boundary between voiced and transition segments. We outline the details of a 4 kbps hybrid coder and present subjective qua...
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تاریخ انتشار 1987