Are you recording in the HS mode on D-VHS?
Is the cable box set to output at the same resolution that you are recording on the D-VHS?
- YES 1080i
Some cable boxes have additional output processing to correct and conceal data problems in the stream.
- I am not sure what you mean by concealing data problems. One thing however is clear that Firewire output on my cable box outputs just motion picture without OSD graphics or text which I see when navigate through channels or stb menus. You may say it is "pure" video output likeit was made to be used with external recorder like dvhs.
Are you using the same HDTV to compare the video. and also using the same type of signal cable to the HDTV?
- Yes, HDMI from dvhs to TV, FireWire from STB to dvhs. I tried on 3 different HDTVs I have in my house, all are latest and greatest, full HD, etc. This is not a TV problem.
You really need to do a side by side comparison of the video playback and the cable box.
- I do compare as I record. During recording video from stb fed to dvhs through FireWire looks perfect, no issues. But when I playback later recorded video, artifacts appear. Again, this is not the case when recording from OTA HD broadcast through ATSC tuner.
You are very lucky, I have never seen a perfect with no artifacts compressed HD video stream.
- I think we might be thinking about different issues here. Below are two captures from same video, first one is perfect, second shows distortion under the cow's eyes and mouth when cow head was moving, this is recorded material. The distortion type shown on 2nd picture never shows up when watching without recording either directly from stb to tv or through dvhs as passthrough. If it was, I would never sign up for my cable in a first place.