Biterate is usually measured in kb per second (kbps) and it is the amount of data stored for that second. The higher the bitrate the higher the quality is stored, but will increase the overall file size.
Sample rate for video is fps and the sample rate for audio is Hz.
Examples of bitrate size for different videos:
Audio bitrates:
Someone speaking 24kbps
Acoustic solo peformance 48kbps
Group peformance low quality 64kbps
Group peformance high quality 128kpbs
CD quality 256kpbs
Reference for audio bitrate: www.boutell.com/newfaq/creating/audiobitrate.html
Reference of video bitrate: http://www.ezs3.com/public/What_bitrate_should_I_use_when_encoding_my_video_How_do_I_optimize_my_video_for_the_web.cfm
Reference of audio bitrate:http://www.fastserv.com/kb/article/mp3_bitrate_selection_and_samples/
Reference of bitrate video: http://ddisoftware.com/tech/articles/march-2009-video-frame-rates-(24p-25p-30p-60i)/
Reference:http://searchnetworking.techtarget.com/definition/bit-rate
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