|
In recent years, mobile Internet technology has been rapid development, not just the basic bandwidth has been greatly improved, the development from the GPRS network to the 3G network, and mobile terminal equipment has also been a significant improvement, from a non-smart phones Go to the main smartphone gradually dominated, both in terms of performance or functional aspects of enhanced a lot. With enhanced hardware, software, along with the number of explosive growth, many applications not previously achievable, or just computer applications, can now be on the phone to get well implemented, with a lot of user groups These popular application which will include mobile streaming media player. Based on the current market, the main variety of smart phones were analyzed and compared, the decision to select Nokia Symbian S60v3 operating system for mobile devices upstream media player design and research, Nokia mobile phones in the global mobile phone market currently occupies a huge share of the . Meanwhile, the paper also analyzed and discussed in depth for mobile streaming media related technology required methods, including streaming media, network protocols, streaming video format, video compression standard, adaptive coding techniques, Symbian platform software development techniques, etc., which choosing the right technology for research and design. In the course of the study of the topic, the main achievement of the two aspects of innovation. The first point is how to ensure that mobile streaming for QOS, this paper proposes a change of state of the network-based streaming media switching method. This method is based on self-made available bandwidth and packet loss rate for the delay evaluation means, depending on the network environment can quickly select the appropriate rate of the streaming media file to switch to achieve the adaptive network environment. The second point is the video format encoder selection above, there is no choice commercially H264 video format used to encode, but try to select the Google's new WebM video format. Since the launch of the new WebM video format, before that does not have any mobile streaming media player uses over the format. Google's WebM format is a chair with an open format, which eliminates the H264 video coding related to patent issues related to, and with the real-time specification Html5 web, WebM format will be widely used.
|