AR# 68742

描述

TS packets generated by the SMPTE Video Over IP are sometimes skipped or duplicated.

1) Repetition of TS packets on the Transport Stream Interface:

2) Some TS packets are chunked.

The Transport Stream Interface provides TS packets, with a continuous skip/repeat behavior, where a chunk of TS packets are repeated, and the following chunk is skipped:

• 7 TS packets by IP -> 56 TS packets by chunk (n1204-> n1260)
• 4 TS packets by IP -> 32 TS packets by chunk (n147 -> n 179)
• 1 TS packets by IP ->  8 TS packets by chunk  (n742 -> n750

The pri_recv_pkt_cnt, link_valid_media_pkt_cnt, and chan_valid_media_pkt_cnt are well incremented according to the received bitrate.

The dup_pkt_cnt, unrec_pkt_cnt and oor_pkt_cnt are not incremented to indicate errors.

The media_buffer_ov does not indicate any overflow and the rx_rtp_pkt_buffered signal provides a coherent number of buffered packets.

The continuity of the sequence number on rx_pri_rtp_seq_num is fine.

解决方案

The issue occurs if the Media Buffer Size is not power of 2.

This can be resolved my setting the Media Buffer Size to a power of 2.