User guide

53

(PSNR)valuefortheframecanbecomputedby
PSNR
br
=‐10log10MSEbr.
Figure2‐4showstheestimatedPSNRvalueoncodingbitrateforMPEG‐2encodedvideo.
Figure2‐4
Estimated
PSNRon
CodingBitrate
forStandard
Definition
MPEG‐2Video
at30Frames
perSecond



Thefollowingexamplesillustratetheimpactofthecodingbitrateonvideoquality.Both
imagesshowthesameframe
fromavideosequenceencodedwithMPEG‐2ataresolutionof
720x480,at30framespersecond.InFigure2‐5thesequencewasencodedatabitrateof
5000Kbps(610KB/s).