Robust transmission of packet video through dispersive packetization and error concealment
نویسندگان
چکیده
In this paper we present a new coding and packetization approach for intraframe coded video transmission, based on space-frequency dispersion. Subband-decomposed video data is packetized so that data appearing in any one packet is highly dispersed in both space and frequency. Each packet is a description of the frame at various points in space and frequency. Any errors arising from packet loss are spread across the frame and this allows easy error concealment. We compare our method to the more conventional block-based packetization scheme and illustrate its advantages in both PSNR and subjective visual quality.
منابع مشابه
Robust Coding and Packetization of Images and Intraframe-coded Video
In this text we consider the problem of robust image/video coding and packetization for the purpose of communication over a packet network. The focus is on Internet transmission. A novel method for achieving error resilience in subband-coded image/video communication is presented. Its characteristic is that subband coe¢cients stored in the same packet are dispersed across the space-frequency do...
متن کاملStudies on Error Control of 3-d Zerotree Wavelet Video Streaming
With the increasing popularity of digital video communications over packet switching networks such as the Internet and wireless networks, error control techniques have become a critical research area. Due to its excellent scalability and performance, embedded 3-D zerotree wavelet video compression has great potential in nonconversational scalable video streaming applications. Although error con...
متن کاملRate-distortion optimized layered coding with unequal error protection for robust Internet video
In this paper, we present an effective framework for increasing the error-resilience of low bit-rate video communications over error-prone packet-switched networks. Our framework is based on the principle of layered coding with transport prioritization. We introduce a rate-distortion optimized mode-selection algorithm for our prioritized layered framework. This algorithm is based on a joint sou...
متن کاملOptimal rate allocation for video coding and transmission over wireless channels
An integrated framework of optimal rate allocation for video coding is presented in the case of transmission over wireless channels without feedback channels. For a fixed channel bit rate and finite number of channel coding rate, the proposed scheme can find the optimal source and channel coding pair and corresponding robust video coding scheme such that the expected end-to-end distortion of vi...
متن کاملError control for Video Streaming with Small Data Units
In multimedia streaming, small errors are typically easier to mask with common error concealment strategies, but small packet size increases the overhead caused by network header information. To reduce the header overhead, large packets are typically favored. In multimedia streaming applications, every packet comprises ideally one individually decodable data unit only. Unfortunately, large pack...
متن کامل