Method for transmitting audio and video under environment of network with different speeds

Abstract

The invention discloses a method for transmitting audio and video under an environment of a network with different speeds applied in a multimedia communication system which at least comprises a data transmitting terminal and a data receiving terminal. The data transmitting terminal at least comprises an encoder, a data buffering and a first control logic, and the data receiving terminal controls the encoder through the first control logic according to the buffer filling degree of the data buffering and selects the source code rate of a content source. The method can be used for automatically detecting the actual data transmitting speed so that the encoding code rate of the audio and video is suitable for the changing network environment and the actual data transmitting speed, therefore, a user enjoys the optimal multimedia quality under the changing network environment.

Description

technical field [0001] The invention relates to a method for transmitting audio and video, in particular to a method for transmitting audio and video under different rate network environments. Background technique [0002] Mobile communication devices and terminals, such as mobile phones, PDAs (Personal Data Assistants), notebook computers, UMPCs (Ultra Mobile Personal Computers), PMPs (Portable Media Players), etc., generally perform data communication in a network environment where the transmission rate changes . The above-mentioned changes in the transmission rate are generally reflected in two aspects: [0003] 1. The coverage of network infrastructure (such as mobile phone base stations) is different. For example, in a 3G (third generation) wireless communication network, a 3G signal (such as WCDMA) can provide a faster data transmission rate (such as 384kbps), but the signal only covers a limited area such as a city center. In other relatively remote areas, such as ...

AI Technical Summary

Problems solved by technology

For example, when covered by 3G signals, due to interference, the received signal quality is poor, and the transmission rate may even be lower than the typical rate when covered by 2.5G signals

[0007] 2. After the user selects a certain version of the content to start playing or communicating, the data transmission cannot adapt to changes in the network environment during the communication process

For example, after the user selects a high-quality, high-bit-rate version to start communication, if the network environment deteriorates, the data transmission rate will decrease, the quality of the multimedia content obtained by the user will decrease significantly, and playback will appear pauses, jams, etc.

Conversely, if the user is conservative and chooses a version with lower quality and lower bit rate, when the network environment can support high data transmission rate, the user will not be able to make full use of the high bandwidth of the network and enjoy better multimedia quality

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