Transcoding of MPEG-II for enhanced resilience to transmission errors
نویسندگان
چکیده
TRANSMISSION ERRORS Robert Swann and Nick Kingsbury Cambridge University Engineering Department Trumpington Street, Cambridge CB2 1PZ. U.K. e-mail: [email protected] and [email protected] ABSTRACT This paper is concerned with the performance of MPEGII compressed video[1] when transmitted over noisy channels, such as for digital terrestrial television. We present the results of bit sensitivity and resynchronisation sensitivity measurements, and propose techniques for substantially improving the resilience of MPEG-II to transmission errors without increasing the bit rate.
منابع مشابه
Submission to Image Communication Special Issue on Mobile Image / Video Transmission Bandwidth Eecient Transmission of Mpeg-ii Video over Noisy Mobile Links
We consider the performance of MPEG-II compressed video when transmitted over noisy channels. We present the results of bit sensitivity and resynchronisation sensitivity measurements , and propose techniques for substantially improving the resilience of MPEG-II to transmission errors without the addition of any extra redundancy into the bitstream. We nd that it is errors in variable length enco...
متن کاملA New Unequal Error Protection Technique Based on the Mutual Information of the MPEG-4 Video Frames over Wireless Networks
The performance of video transmission over wireless channels is limited by the channel noise. Thus many error resilience tools have been incorporated into the MPEG-4 video compression method. In addition to these tools, the unequal error protection (UEP) technique has been proposed to protect the different parts in an MPEG-4 video packet with different channel coding rates based on the rate...
متن کاملFixed-packet-length Transcoding for Error Resilient Video Transmission over Wcdma Radio Links
Robust video transmission over wireless channels is very critical, due to channel impairments and to their effect on the compressed bitstream. In order to improve error resilience and, consequently, the received video quality, a novel unequal error protection (UEP) technique (fixed-packet-length transcoding assisted UEP, FPT-UEP) is proposed in the paper, and applied to the case of MPEG-4 video...
متن کاملMPEG 2 Video Services for Wireless ATM Networks
Audio-visual and other multimedia services are seen as an important source of traffic for future telecommunications networks, including wireless networks. In this paper, we examine the impact of the properties of a 50 Mb/s asynchronous transfer mode (ATM)-based wireless local-area network (WLAN) on moving picture experts group phase 2 (MPEG 2) compressed video traffic, with emphasis on the netw...
متن کاملSelective Requantization for Transcoding of MPEG Compressed Video
This paper addresses the problem of bit-rate conversion of MPEG compressed video. We present selective requantization, a method for reducing the requantization errors in transcoding. The proposed method is based on avoiding critical ratios of the two cascaded quantizations (encoding versus transcoding) that either lead to larger transcoding errors or require a higher bit budget. Results show th...
متن کامل