Abstract:
Hybrid Digital-Analog (HDA) transmission for wireless video multicast, has gained great attention recently, as it can integrate the advantages of digital and analog codin...Show MoreMetadata
Abstract:
Hybrid Digital-Analog (HDA) transmission for wireless video multicast, has gained great attention recently, as it can integrate the advantages of digital and analog coding simultaneously. In this paper, a new HDA video transmission scheme is proposed, named VCAST, which exploits the visual information to improve both subjective visual and objective quality. Since the visual information reflects human perception and mainly exists in middle and high frequency bands, VCAST extracts these bands of video and transmits them in digital way, i.e., H.264/AVC, for high transmission accuracy and good subjective quality. Then the remaining of the video, namely the insensitive information, is processed by 2D-DWT and divided into the approximation and the details parts, i.e., LL band and HL, LH, HH bands. The LL band is also transmitted by H.264/AVC. The HL, LH, HH bands and the residual of LL band are transmitted in analog way by SoftCast, for saving energy and good objective quality. Results show that the proposed VCAST significantly outperforms WSVC, SoftCast and H.264/AVC in both the objective metric (i.e., peak signal-to-noise ratio, PSNR) and the subjective metric (i.e., structural similarity, SSIM).
Published in: 2016 Visual Communications and Image Processing (VCIP)
Date of Conference: 27-30 November 2016
Date Added to IEEE Xplore: 05 January 2017
ISBN Information: