METHOD TO MATCH INPUT AND OUTPUT TIMESTAMPS IN A VIDEO ENCODER AND ADVERTISEMENT INSERTER

1 . A machine-implemented method, comprising:

decoding a compressed video data frame in a video transcoder creating a decoded video data frame;

embedding a network presentation timestamp in the decoded video data frame;

re-encoding the decoded video data frame in the video transcoder creating a transcoded video data frame; and

comparing the network presentation timestamp with a transcoder presentation timestamp to determine a timestamp offset.

2 . The method of claim 1 , further comprising:

embedding the network presentation timestamp in a vertical blanking interval.

3 . The method of claim 1 , further comprising:

embedding the network presentation timestamp in a video frame header.

4 . The method of claim 1 , further comprising:

bypassing an associated audio data set around the video transcoder.

5 . The method of claim 4 , further comprising:

delaying the associated audio data set to match the transcoded video data frame.

6 . The method of claim 1 , further comprising:

tracking an input program clock reference with an input counter; and

tracking an output program clock reference with an output counter.

7 . The method of claim 6 , further comprising:

delaying an associated audio data set based on the input program clock reference and the output program clock reference.

8 . The method of claim 1 , further comprising:

inserting a local video stream using a splice timestamp.

9 . The method of claim 1 , further comprising:

identifying a switch frame using a splice timestamp.

10 . The method of claim 1 , further comprising:

switching to a compressed audio data set using a splice timestamp.

11 . The method of claim 1 , further comprising:

switching to a pulse code modulated audio data set using a splice timestamp.

12 . A video processing system comprising:

a network video channel input that receives a compressed video data frame with a network presentation timestamp;

a video transcoder that decodes the compressed video data frame creating a decoded video data frame, embeds the network presentation timestamp in the decoded video data frame, and re-encodes the decoded video data frame creating a transcoded video data frame.

13 . The video processing system of claim 12 , wherein the video transcoder embeds the network presentation timestamp in a vertical blanking interval.

14 . The video processing system of claim 12 , wherein the video transcoder embeds the network presentation timestamp in a header stuffing.

15 . The video processing system of claim 12 , further comprising:

an audio data bypass that receives an associated audio data set around the video transcoder.

16 . The video processing system of claim 15 , wherein the audio data bypass delays the associated audio data set to match the compressed video data frame.

17 . The video processing system of claim 12 , further comprises:

a field programmable gate array that compares the network presentation timestamp with a transcoder presentation timestamp to determine a timestamp offset.

18 . The video processing system of claim 12 , further comprising:

a local video channel input that receives a local video stream for insertion after the compression video data frame.

19 . A electronic device, comprising:

a network video channel input that receives a compressed video data frame;

a video transcoder that decodes the compressed video data frame and re-encodes the compressed video data frame.

an input counter that tracks an input program clock reference; and

an output counter that tracks an output program clock reference.

20 . The electronic device of claim 19 , further comprising:

an audio data bypass that delays an associated audio data set based on the input program clock reference and the output program clock reference.