Compression artefacts- is it a sd recording thing, or poor compression

Carawaystick

I was watching the Sunday Game. The highlights of camogie have brutal mpeg artefacts on the grass. Kind of like what I'd expect on itv4 or ch5 . I thought the mpeg artefacts would be due to the actual mpeg compression not the definition.

I'm watching it on rte2hd on saorview on a CRT tv,

Antenna

Carawaystick wrote: »

I was watching the Sunday Game. The highlights of camogie have brutal mpeg artefacts on the grass. Kind of like what I'd expect on itv4 or ch5 . I thought the mpeg artefacts would be due to the actual mpeg compression not the definition.

Artefacts are due to the MPEG compression (resulting from what bit-rate is used,- the lower the bit rate, the worse the 'artefacts' and motion-blur will be) not the definition,

I didn't see any of The Sunday Game, are you saying the picture quality of the camogie was inferior to the picture quality of the hurling highlights on the same show?
It is down to the on location videoing if that was the case, something recorded in inferior bitrate with inferior gear is not going to be improved by being broadcast later on a HD channel. As the saying says "put rubbish in - get rubbish out".


BTW with your CRT TV connected by SCART you are in fact viewing the HD channels converted to SD by the box. However the quality is going to be better in comparision due to the low bitrates used on native SD channels in Ireland (the BBC has significantly better horizontal resolution for their SD channels than is the case for SD channels on Saorview).

Carawaystick

Yeah, they showed Hurling which was grand, then 2 camogie highlights with poor quality, lots of artefacts when the grass was moving on screen. Then Ladies football ( probably recorded by tg4) which was fine.

Are mpeg4 encoders all that dear? Is this just pennypinching from rte?