Thomas Schierl

Learn More
Unlike H.264/AVC, where parallelism was an afterthought, HEVC currently contains several proposals aimed at making it more “parallel-friendly”. A performance comparison of the different proposals, however, has not yet been performed. In this article we will fill this gap by presenting efficient implementations of the most promising parallelization(More)
The Scalable Video Coding (SVC) standard as an extension of H.264/AVC allows efficient, standard-based temporal, spatial, and quality scalability of video bit streams. Scalability of a video bit stream allows for media bit rate as well as for device capability adaptation. Moreover, adaptation of the bit rate of a video signal is a desirable key feature, if(More)
HTTP-based delivery for Video on Demand (VoD) has been gaining popularity within recent years. Progressive Download over HTTP, typically used in VoD, takes advantage of the widely deployed network caches to relieve video servers from sending the same content to a high number of users in the same access network. However, due to a sharp increase in the(More)
The bitstream structure of layered media formats such as scalable video coding (SVC) or multiview video coding (MVC) opens up new opportunities for their distribution in Mobile TV services. Features like graceful degradation or the support of the 3-D experience in a backwards-compatible way are enabled. The reason is that parts of the media stream are more(More)
We propose a dynamic sharing of radio resources in a wireless multiuser system by combining a flexible video coding scheme, namely the currently developed scalable video coding (SVC) extension of H.264/AVC with appropriate radio link buffer management for multiuser streaming services. The paper introduces the components of the proposed system and the used(More)
The ongoing standardization activity in DVB on IP−based video and audio streaming services over DVB−H networks currently specifies three terminal classes ranging from QCIF, 15 Hz, and max. 128 kbit/s to CIF, 30 Hz, and max. 768 kbit/s. The reason for specifying these is to offer ser−vices to different terminal classes with different processing and battery(More)
This paper describes the integration of High Efficiency Video Coding (HEVC) into end-to-end multimedia systems, formats, and protocols such as Real-time transport Protocol, the transport stream of the MPEG-2 standard suite, and dynamic adaptive streaming over the Hypertext Transport Protocol. This paper gives a brief overview of the high-level syntax of(More)
OBJECTIVE Television and computer game consumption are a powerful influence in the lives of most children. Previous evidence has supported the notion that media exposure could impair a variety of behavioral characteristics. Excessive television viewing and computer game playing have been associated with many psychiatric symptoms, especially emotional and(More)
The scalability extension of H.264/AVC [1] uses a layered approach for providing spatial, temporal, and SNR scalability. Due to this concept, only a restricted set of spatio-temporal-SNR points can be extracted and decoded from a global scalable bit-stream, and this set of points is defined by the chosen encoder configuration. In this paper, we present a(More)
SIMD instructions have been commonly used to accelerate video codecs. The recently introduced HEVC codec like its predecessors is based on the hybrid video codec principle, and, therefore, also well suited to be accelerated with SIMD. In this paper we present the SIMD optimization for the entire HEVC decoder for all major SIMD ISAs. Evaluation has been(More)