| 摘要 |
A method of transmitting quality data in a media stream is disclosed in which the media stream is sent in accordance with a media streaming protocol (e.g. real-time transport protocol RTP). The method comprises generating 501 data indicative of the quality of the media stream, wherein such data is conventionally associated with a first type identifier (such as Network Abstraction Layer (NAL) unit type 6 - for supplemental enhancement information / SEI). The generated quality data is encapsulated 502 in a data structure defined by the protocol wherein the data structure comprises fields assigned to specify data contained therein. The generated quality data is assigned 503 to a second type identifier (different to the first, for example NAL unit type 0, 30 or 31). A packet is formed 504 comprising the data structure and the packet is transmitted 505 in the media stream. By assigning the quality data to previously undefined/unspecified NAL unit types 0, 30 or 31, the quality data may be more efficiently exchanged between a media source and a consumer device to enable necessary corrective operations to be performed upon the media stream to optimise/maintain its quality. |
