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首页> 外文会议>Multimedia and Expo, 2006 IEEE International Conference on >Video Encoding and Splicing for Tune-in Time Reduction in IP Datacasting (IPDC) Over DVB-H
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Video Encoding and Splicing for Tune-in Time Reduction in IP Datacasting (IPDC) Over DVB-H

机译：在DVB-H上进行IP数据广播（IPDC）时，可以通过视频编码和拼接来缩短调整时间

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摘要

A novel video encoding and splicing method is proposed which minimizes the tune-in time of "channel zapping", i.e. changing from one audiovisual service to another, in IPDC over digital video broadcasting for handheld terminals (DVB-H). DVB-H uses a time-sliced transmission scheme to reduce the power consumption used for radio reception. Tune-in time in DVB-H refers to the time between the start of the reception of a broadcast signal and the start of the media rendering. One of the significant factors in tune-in time is the time from the start of media decoding to the start of correct output from decoding, which is minimized when a time-slice is started with a random access point picture such as an independent decoding refresh (IDR) picture in H.264/AVC. In IPDC over DVB-H, encapsulation to time-slices is performed independently from encoding in a network element called IP encapsulator. At the time of encoding, time-slice boundaries are not known exactly, and it is therefore impossible to govern the location of IDR pictures relative to time-slices. It is proposed that an additional stream consisting of IDR pictures only is transmitted to the IP encapsulator, which replaces pictures in a normal bitstream with IDR pictures according to time-slice boundaries in order to achieve the minimum tune-in time. It has to be ensured that the "spliced" stream resulting from the operation of the IP encapsulator complies with the hypothetical reference decoder (HRD) specification of H.264/AVC. A video encoding and rate control system is proposed to satisfy the HRD requirements for the spliced stream. Simulation results show that in addition to fulfilling HRD compliancy, good average quality of decoded video is achieved with minimum tune-in time
机译：提出了一种新颖的视频编码和拼接方法，该方法在用于手持终端的数字视频广播（DVB-H）的IPDC中，最小化了“频道切换”的调台时间，即从一种视听服务切换到另一种视听服务。 DVB-H使用时间分段传输方案来减少用于无线电接收的功耗。 DVB-H中的调谐时间是指从开始接收广播信号到开始媒体渲染之间的时间。调入时间的重要因素之一是从媒体解码开始到解码正确输出开始的时间，当使用随机访问点图片（例如独立解码刷新）开始时间切片时，此时间可以最小化H.264 / AVC中的（IDR）图片。在DVB-H上的IPDC中，对时间片的封装是独立于称为IP封装器的网络元素中的编码执行的。在编码时，时间片边界尚不完全清楚，因此不可能控制IDR图片相对于时间片的位置。建议将仅由IDR图片组成的附加流传输到IP封装器，IP封装器根据时间片边界用IDR图片替换正常比特流中的图片，以实现最小的调入时间。必须确保IP封装器操作产生的“拼接”流符合H.264 / AVC的假设参考解码器（HRD）规范。提出了一种视频编码和码率控制系统，以满足拼接流对HRD的要求。仿真结果表明，除了满足HRD要求外，还可以在最少调校时间的情况下获得良好的解码视频平均质量

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