Method and apparatus for media data delivery control
A method and apparatus control receiving media data in a transmission system. A method of operating a receiving entity in the transmission system includes receiving packets for media data and information about a fixed delay associated with the media data. The method also includes identifying a requirement configured to guarantee that the packets for the media data are delivered to an upper layer of the receiving entity after the fixed delay, from the information about the fixed delay. The method further includes identifying a buffer size requirement for the receiving entity estimated based on the fixed delay and bitrate information associated with the media data; and delivering the packets to the upper layer of the receiving entity.
1. A method of operating a receiving entity in a transmission system, the method comprising:
receiving, from a sending entity in the transmission system:
at least one packet for media data, each of the at least on packet including a transmission timestamp,
information on a fixed delay, and
information on a buffer size requirement for delivering the at least one packet to an application layer of the receiving entity;
identifying the information on the fixed delay and the information on the buffer size requirement; and
removing one or more packets among at least one the packet from a de-jitter buffer of the receiving entity at a sum of the transmission timestamp and the fixed delay,
wherein the buffer size requirement is estimated based on:
a difference between a minimum transmission delay and a maximum transmission delay, and
a maximum bitrate related to the at least one packet,
wherein the fixed delay is calculated based on a sum of a forward error correcting (FEC) buffering delay and the maximum transmission delay, if FEC is applied to the at least one packet.
2. An apparatus in a receiving entity in a transmission system, the apparatus comprising:
a receiver configured to receive, from a sending entity in the transmission system:
at least one packet for media data, each of the at least one packet including a transmission timestamp,
information on a fixed delay, and
information on a buffer size requirement for delivering the at least one packet to an application layer of the receiving entity; and
a controller configured to:
identify the information on the fixed delay and the information on the buffer size requirement; and
remove one or more packets among the at least one packet from a de-jitter buffer of the receiving entity at a sum of the transmission timestamp and the fixed delay,
wherein the buffer size requirement is estimated based on:
a difference between a minimum transmission delay and a maximum transmission delay, and
a maximum bitrate related to the at least one packet, and
wherein the fixed delay is calculated based on a sum of a forward error correcting (FEC) buffering delay and the maximum transmission delay, if FEC is applied to the at least one packet.