Low bit-rate audio coder using an M-band multiresolution filter bank

1997 ◽  
Vol 33 (4) ◽  
pp. 262
Author(s):  
S. Boland ◽  
M. Deriche
Keyword(s):  
Filter Bank ◽  
Bit Rate ◽  
Low Bit Rate ◽  
Audio Coder

ANALYSIS ON DIRECTIONAL FILTER BANK FOR PRESERVING TEXTURE IMAGE

2015 ◽  
Vol 77 (19) ◽  
Author(s):  
Yahya Naji Saleh Obad ◽  
Ruzelita Ngadiran ◽  
Muhamad Imran Ahmad ◽  
Puteh Saad
Keyword(s):  
Filter Bank ◽  
Structural Similarity ◽  
Experimental Result ◽  
Bit Rate ◽  
Signal To Noise ◽  
Directional Information ◽  
Directional Filter Bank ◽  
Low Bit Rate ◽  
Directional Filter ◽  
Texture Information

Directional filterbank such as contourlet become popular due its ability to capture two dimensional curves efficiently. In this work, transform with directional filterbank is tested to preserve texture information in texture images. Our initial hypothesis is that, transform with directional filter bank will be able to preserve texture information efficiently when compare to wavelet. However this hypothesis is limited if the texture information contained in the images consist of directional information. Textures in this work are referring to repetition pattern in an image. The directional filterbank selected for testing are Non-uniform Directional filterbank (NuDFB) and Contourlet. The texture images are applied with both transforms and the non-linear approximation method is used to capture the significant coefficients of the transformed pixels. The implementations are then compared with wavelet transform as a benchmark. From the experimental result it can be seen that wavelet implementation still managed to outperform directional filter bank transform at higher bit rate. In low bit rate however some significant improvement can be seen from the Peak Signal to noise ratio (PSNR) especially to texture images that contains directional information. In term of Structural Similarity it supports the results of Peak Signal to noise ration with a rare different values.  As a conclusion, the directional filterbank transform able to preserve texture information in texture images especially the directional information but limited to a very low bit rate data.

Resolution Warped Spectral Representation for Low-Delay and Low-Bit-Rate Audio Coder

2015 ◽  
Vol 23 (2) ◽  
pp. 288-299 ◽  
Author(s):  
Ryosuke Sugiura ◽  
Yutaka Kamamoto ◽  
Noboru Harada ◽  
Hirokazu Kameoka ◽  
Takehiro Moriya
Keyword(s):  
Spectral Representation ◽  
Bit Rate ◽  
Low Bit Rate ◽  
Low Delay ◽  
Audio Coder

Efficient Frame Error Concealment Using Bilateral Motion Estimation for Low Bit-Rate Video Transmission

2009 ◽  
Vol E92-B (2) ◽  
pp. 461-472
Author(s):  
DinhTrieu DUONG ◽  
Min-Cheol HWANG ◽  
Byeong-Doo CHOI ◽  
Jun-Hyung KIM ◽  
Sung-Jea KO
Keyword(s):  
Motion Estimation ◽  
Video Transmission ◽  
Error Concealment ◽  
Bit Rate ◽  
Low Bit Rate

Design and Implementation of Low Bit-rate Real-time Video Encoder Based on DSP

2011 ◽  
Vol 30 (4) ◽  
pp. 945-948
Author(s):  
Shao-hua Liu ◽  
Zhi-hui Xiong ◽  
Wei-dong Bao ◽  
Mao-jun Zhang
Keyword(s):  
Real Time ◽  
Bit Rate ◽  
Video Encoder ◽  
Low Bit Rate ◽  
Design And Implementation
Sign in / Sign up

Export Citation Format

Share Document