منابع مشابه
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 ...
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Vector quantization-based approaches to speech coding have generated new interest in very low bit rate speech coding, that is, speech coded to bit rates below 1200 bits/sec. To achieve such low bit rates, it is necessary to quantize the pitch and energy parameters at rates below 100 bits/sec. Contour quantization is introduced as a technique in which the contour of a given parameter is normaliz...
متن کاملSpeech Coding at very low rate
This work is an introduction to research in the field of speech coding. The goal is to become familiar with the latest technical analysis and speech coding to get the developing of two coders operating at very low speed, respectively (2400 and 1200 bps). The choice of the encoding algorithm has been focused on the MELP (Mixed Excitation Linear Prediction), which has a flow rate ratio / interest...
متن کاملWavenet based low rate speech coding
Traditional parametric coding of speech facilitates low rate but provides poor reconstruction quality because of the inadequacy of the model used. We describe how a WaveNet generative speech model can be used to generate high quality speech from the bit stream of a standard parametric coder operating at 2.4 kb/s. We compare this parametric coder with a waveform coder based on the same generativ...
متن کاملLow rate speech coding for telecommunications
Over the last decade major advances have been made in speech coding technology which is now widely used in international, digital mobile and satellite networks. The most recent techniques permit telephone network quality speech transmission at 8 kbit/s, but there are still demands for even lower rates and more flexible, good quality coding techniques for various network applications. This paper...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 1991
ISSN: 0090-6778
DOI: 10.1109/26.87186