Data receiving device, data receiving method, and data transmission method

Abstract

A data reception apparatus is provided with a data request / reception unit for requesting media data corresponding to first and second foreground images from servers having the media data, and receiving a message from each servers; and a control data generation unit for controlling the data request / reception unit such that it issues a request message for each media data at a time by a predetermined latency time earlier than the display start time of each foreground image, on the basis of information indicating the latency time before starting display of the foreground image, which information is included in SMIL data indicating scene description. Therefore, each of the first and second foreground images can be combined with a background image and displayed at a time designated in the scene description.

Description

technical field [0001] The present invention relates to a data receiving device, a data receiving method, a data transmission method, and a data storage medium, and particularly relates to transmission processing of control data including a storage location of media data and a playback start time from a server providing media data, and access to the server A receiving process for receiving and reproducing media data, and a data recording medium storing a program for performing the above-mentioned transmission process and receiving process by a computer. Background technique [0002] In recent years, with the advancement of compression coding technology for image data and audio data, and the expansion of data transmission capacity of networks such as the Internet and wireless networks, there has been a process of processing images, audio, text, etc. called media data. data business. [0003] Such services are mainly provided through downloading in the prior art. In this dow...

AI Technical Summary

Problems solved by technology

[0076] In this way, if the time required for message exchange and pre-buffering with the server is considered, after the scene playback starts, within the display time of each image data described in the SMIL data, a message requesting each image data is sent to the server. The existing data receiving device 901 cannot play back the correct scene as specified by the scene description

[0077] Moreover, there are cases where the appropriate pre-buffering time is different for each bit stream (encoded data of each image data) corresponding to each image data, therefore, it is not possible to set an appropriate pre-buffering time in the receiving terminal (data receiving device). The pre-buffering time, on the receiving terminal side, in the decoding process of the image data, the image data in the buffer in the data receiving device may be excessive or insufficient, that is, buffer underflow and overflow

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