Method and apparatus for decoder buffering in hybrid coded video system

A receiving device in a video system which uses a hybrid video codec, the receiving device comprising:

• a first video decoder which decodes a received transport stream using a first video codec;
• a second video decoder which decodes the transport stream using a second video codec;
• and
• a delay buffer which is connected to the first video decoder and operates,
• wherein a size of the delay buffer is determined based on a difference between a buffer size of a first transport stream system target decoder (T-STD) stipulated in a first video encoder and a buffer size of a second T-STD stipulated in the second video encoder,
• wherein the first T-STD is the first video decoder and the second T-STD is the second video decoder.

A decoder buffering method in a video system which uses a hybrid video codec, the decoder buffering method comprising:

• receiving a transport stream which is generated by multiplexing a first video encoded by a first video encoder and a second video encoded by a second video;
• adjusting a buffer for a first transport stream system target decoder stipulated in the first video encoder and a second T-STD stipulated in the second video encoder;
• and
• decoding the transport stream by the first T-STD and the second T-STD based on the adjusted buffer.