ridm@nrct.go.th   ระบบคลังข้อมูลงานวิจัยไทย   รายการโปรดที่คุณเลือกไว้

Robust image coding based upon compressive sensing

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Robust image coding based upon compressive sensing
นักวิจัย : Deng, Chenwei , Lin, Weisi , Lee, Bu-Sung , Lau, Chiew Tong
คำค้น : DRNTU::Engineering::Computer science and engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Deng, C., Lin, W., Lee, B.-S., & Lau, C. T. (2012). Robust image coding based upon compressive sensing. IEEE transactions on multimedia, 14(2), 278-290. , 1520-9210 , http://hdl.handle.net/10220/11476 , http://dx.doi.org/10.1109/TMM.2011.2181491
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : IEEE transactions on multimedia
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Multiple description coding (MDC) is one of the widely used mechanisms to combat packet-loss in non-feedback systems. However, the number of descriptions in the existing MDC schemes is very small (typically 2). With the number of descriptions increasing, the coding complexity increases drastically and many decoders would be required. In this paper, the compressive sensing (CS) principles are studied and an alternative coding paradigm with a number of descriptions is proposed based upon CS for high packet loss transmission. Two-dimentional discrete wavelet transform (DWT) is applied for sparse representation. Unlike the typical wavelet coders (e.g., JPEG 2000), DWT coefficients here are not directly encoded, but re-sampled towards equal importance of information instead. At the decoder side, by fully exploiting the intra-scale and inter-scale correlation of multiscale DWT, two different CS recovery algorithms are developed for the low-frequency subband and high-frequency subbands, respectively. The recovery quality only depends on the number of received CS measurements (not on which of the measurements that are received). Experimental results show that the proposed CS-based codec is much more robust against lossy channels, while achieving higher rate-distortion (R-D) performance compared with conventional wavelet-based MDC methods and relevant existing CS-based coding schemes.

บรรณานุกรม :
Deng, Chenwei , Lin, Weisi , Lee, Bu-Sung , Lau, Chiew Tong . (2554). Robust image coding based upon compressive sensing.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Deng, Chenwei , Lin, Weisi , Lee, Bu-Sung , Lau, Chiew Tong . 2554. "Robust image coding based upon compressive sensing".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Deng, Chenwei , Lin, Weisi , Lee, Bu-Sung , Lau, Chiew Tong . "Robust image coding based upon compressive sensing."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Deng, Chenwei , Lin, Weisi , Lee, Bu-Sung , Lau, Chiew Tong . Robust image coding based upon compressive sensing. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.