Temporal decomposition for low rate wideband speech compression
نویسندگان
چکیده
منابع مشابه
Temporal decomposition for low rate wideband speech compression
An investigation into low bit rate wideband speech coding for applications such as unicast streaming is presented. Wideband spectral parameters are quantised below 1 kbit/s using temporal decomposition (TD) applied to the line spectral frequencies. Quantisation using TD performs significantly better than split vector quantisation at an equivalent bit rate. Disciplines Physical Sciences and Math...
متن کاملTemporal decomposition: a promising approach to low rate wideband speech compression
In this paper, we present new results on Temporal Decomposition (TD) applied to the Line Spectral Frequencies (LSFs) derived for wideband speech. The paper shows that by incorporating a dynamic programming search algorithm into TD, near transparent quantisation of wideband LSFs can be obtained at approximately 1 kbps. We also show that TD performs significantly better than Split Vector Quantisa...
متن کاملLow bit rate wideband WI speech coding
This paper investigates Waveform Interpolation (WI) applied low bit rate wideband speech coding. An analysis of the evolutionary behaviour of wideband Characteristic Waveforms (CWs) shows that direct application of the classical WI algorithm may not be appropriate for wideband speech. We propose a modification whereby CW quantisation is performed using classical WI decomposition for the low fre...
متن کاملVery low rate speech coding using temporal decomposition and waveform interpolation
In very low rate coding the aim is to accurately represent speech characteristics as efficiently as possible. High coding gains for the spectral features can be achieved through the use of temporal decomposition. Waveform interpolation coders accurately represent the excitation using characteristic waveforms (CWs) extracted at a constant rate. In this paper, the two approaches are combined into...
متن کاملBandwidth Extension of Narrowband Speech for Low Bit-Rate Wideband Coding
Wireless telephone speech is usually limited to the 300 − 3400Hz band, which reduces its quality. There is thus a growing demand for wideband speech systems that transmit from 50Hz to 8000 Hz. This paper presents an algorithm to generate wideband speech from narrowband speech using as low as 500 bits/s of side information. The 50 − 300Hz band is predicted from the narrowband signal. A sourceexc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Electronics Letters
سال: 2001
ISSN: 0013-5194
DOI: 10.1049/el:20010349