low-bit-rate coding speech
Very Low Rate Scalable Speech Coding through Classified Embedded Matrix Quantization
... of bit rate operation. Our intention of testing the bit range of 700–900 was just to evaluate the granularity of the designed embedded ...same bit rate, has been confirmed, in terms of ...
13
Very Low Bit Rate Video Coding by Combining H 264/AVC Standard and 2 D Discrete Wavelet Transform
... very low capacity channels like the home-used dial-up ...very low capacity channels in which our proposed video coding system can be used ...works, speech or other data are communicated ...
9
Gaussian Mixture Model-based Quantization of Line Spectral Frequencies for Adaptive Multirate Speech Codec
... parametric coding approach based on Gaussian mixture models ( GMM ) has been proposed for low-complexity mem- oryless vector quantization of LPC parameters ( Hedelin & Skoglund, 2000, Subramaniam & ...
14
Speech Coding Techniques: A Comparative Study
... Speech coding aims in compact digital representations of the uttered signals ...efficient speech coding mechanism are: transmission quality, multiuser capability, low storage ...
5
Adaptive Long-Term Coding of LSF Parameters Trajectories for Large-Delay/Very- to Ultra-Low Bit-Rate Speech Coding
... The design of the quantizers was made by applying the LBG algorithm [33] on the (voiced or unvoiced) training corpus described in Section 4.1, using the perceptual weighted Euclidian distance between LSF vectors proposed ...
13
A Bit Stream Scalable Speech/Audio Coder Combining Enhanced Regular Pulse Excitation and Parametric Coding
... and low bit rate representation of the LP residual whereas a subsequent RPE stage models “finer” details of the LP ...overall bit rate, little can be done to improve the scalability ...
14
Implementation of Low Bit Rate Vocoder for Speech Compression
... applications, low bit-rate speech compression methods are ...Several speech processing applications such as Mixed Excitation Linear Prediction are characterized by very strict ...
5
Bandwidth Efficient Wireless Multimedia Communications
... resilient speech codecs have been developed, and with the advent of the 8-kbits/s ...ITU speech codec, this field reached a remarkable state of ...fixed- rate video codecs, which can generate a ...
41
Speech Coding Methods, Standards, and Applications. Jerry D. Gibson
... Natural Coding Toolbox, relatively little effort has been put into developing SNR scalable or bandwidth scalable speech ...relatively low level of effort is the lack of motivating ...scalable ...
42
Perceptual Evaluation of a New Subband Low Bit Rate Speech Compression System based on Waveform Vector Quantization and SVD Postfiltering
... a Low Frequency (LF) and a High Frequency (HF) part. Efficient coding of the HF part may be achieved using quantization methods and in particular waveform vector quantization (VQ), while the LF part may be ...
5
Steganography integration into a low-bit rate speech codec
... a speech frame takes less than 20 us on average, which is negligible in comparison with the allowable coding time of 15 ms for each frame in ...inactive speech frames encoded by ...
30
GiLBCSteg: VoIP Steganography Utilizing the Internet Low Bit Rate Codec
... and seven bits to represent the second and third index. This is a total of twenty bits per set, for a total of 40 bits per block. Because the decoder requires these coefficients, they are sent along as part of the ...
6
1. Multi-rate signal processing sub-band coding for speech signal
... one rate has to be used by a system that expects a different rate, the rate has to be increased or decreased, and some processing is required to do ...sub-Band coding on an real time ...
7
Rate Distortion Analysis and Bit Allocation Scheme for Wavelet Lifting-Based Multiview Image Coding
... model-based bit allocation scheme for wavelet lifting-based multiview image ...of bit allocation in image ...the low-pass and high-pass subbands of each image view obtained from the DCWL process is ...
13
Image compression algorithm of floral canopy based on mask hybrid coding for ROI
... block coding with optimized truncation (EBCOT) and post-compression rate-distortion optimization (OPT-PCRD) of the JPEG2000 format, and it is not universally applicable; and the staggered displacement ...
11
ANALYSIS AND REVIEW OF EFFICIENT DECODING ALGORITHMS FOR LOW DENSITY PARITY CHECK(LDPC) CODE
... generated by check node unit and variable node unit with offset operations. If the input Loglikelihood ratio (LLR) informatio n bits are close to each other in terms of magnitude, then the output information will be ...
6
Design of graphical user interface for multiuser SAC OCDMA performance analysis
... modification in the spectral distribution of the s-decoder. The summary of SPD block diagram is described here and full details can be found in [16]. The decoder has an identical response to the intended encoder for the ...
36
Bit Error Rate Performance of OFDM/OQPSK and CPM with Channel Coding Over AWGN Channel
... paper, Bit Error Rate performance of Orthogonal Frequency Division Multiplexing/Offset Quadrature Phase Shift Keying (OFDM/OQPSK) and Continuous Phase Modulation (CPM) over Additive White Gaussian Noise ...
9
SECURE VOICE COMMUNICATION USING LOW BIT RATE SYSTEM FOR GSM USERS
... overall bit rate of the system while still maintaining toll- quality speech and providing security to the speech signal before its transmission over the ...
5
FMO-based H.264 frame layer rate control for low bit rate video transmission
... Motion vectors of neighbouring MBs are often corre- lated because object motion can extend over large regions in the frame. In H.264/AVC, this correlation is exploited by computing a motion vector prediction from the MBs ...
11