Scalable codec architectures for Internet video-on-demand

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI:10.1109/ACSSC.1997.680241

B. Girod, N. Farber, U. Horn

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引用次数: 22

Abstract

The heterogeneous structure of the Internet is a great obstacle for establishing real-time video services. Scalable video codecs, generating bit-streams decodable at different rates, have been proposed to address the heterogeneity problem. In this paper, we review standard-compliant and non-compliant codec architectures for Internet video-on-demand. For compression based on the H.263 standard, we have developed a compatible architecture that allows to switch between pre-encoded bit-streamers of different bitrates. This architecture provides excellent streaming performance for point-to-point communication scenarios that offer a low delay feedback channel. Then we present a non-compliant fully scalable video codec based on a spatiotemporal resolution pyramid. This approach can encode embedded lower bit-rate layers at the same overall hit-rate as needed by H.263 single-layer coding and can also support multicasting. The complexity of both schemes is sufficiently low to allow software-only implementations of Internet video services. This is demonstrated by means of an implemented World Wide Web video server application.

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面向互联网视频点播的可扩展编解码器架构

互联网的异构结构是建立实时视频服务的一大障碍。可扩展的视频编解码器，以不同的速率产生可解码的比特流，已经被提出来解决异构问题。在本文中，我们回顾了符合标准和不符合标准的互联网视频点播编解码器体系结构。对于基于H.263标准的压缩，我们开发了一种兼容的架构，允许在不同比特率的预编码比特流之间切换。该架构为提供低延迟反馈通道的点对点通信场景提供了出色的流性能。然后，我们提出了一种基于时空分辨率金字塔的非兼容的全可伸缩视频编解码器。这种方法可以在H.263单层编码所需的相同总体命中率下对嵌入的低比特率层进行编码，并且还可以支持多播。这两种方案的复杂性都足够低，可以实现纯软件的互联网视频服务。这是通过一个实现的万维网视频服务器应用程序来演示的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)

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