Method for displaying preview of programs in digital multimedia broadcast

Abstract

The present invention provides a method for displaying program previews in digital multimedia broadcasting. When a user operates a terminal to start a digital multimedia broadcasting service, enters an electronic program guide, and selects an unsubscribed program, the following processing is performed: (a) The terminal starts a time-limiting module Start timing, and start the decryption and descrambling module to decrypt and descramble the media stream of the selected program received, output to the player to play, for the user to preview the program; (b) the time for the user to preview the selected program reaches the time limit module setting When the time-limited threshold is determined, stop decrypting and descrambling the media stream of the selected program; (c) the program preview ends. In the present invention, the system side does not need to make and store a large number of program preview fragments in advance, but directly intercepts a fragment from the program media stream by the terminal and presents it to the user for preview, which greatly saves bandwidth resources and reduces the burden on the system side. burden.

Description

technical field [0001] The invention relates to the field of digital multimedia broadcasting, in particular to a method for displaying program previews in digital multimedia broadcasting. Background technique [0002] In digital multimedia broadcasting, users select the channels and programs they want to watch according to the electronic program guide (EPG: Electronic Program Guide, some systems are also called electronic service guide, electronic service guide or electronic program list), and then place an order. From the user's point of view, before ordering is finalized, it is hoped to see a preview segment of the program so as to have an intuitive feeling for the program content. In the current digital multimedia broadcasting system, program preview fragments can be included in the electronic program guide. The purpose of the preview is to select a program that has not been ordered after the user enters the electronic program guide, and the terminal will play the fragmen...

AI Technical Summary

Problems solved by technology

However, in mobile multimedia broadcasting systems such as mobile phone TV systems, because wireless bandwidth resources are limited, if a large number of program preview segments are included in the electronic program guide, the available bandwidth of multimedia program media streams will be greatly reduced, which is not conducive to bandwidth resources. effective use of

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