Question : You have been assigned to design and produce the audio portions of a multimedia project. The program will be delivered on CD-ROM, and video clips will take up most of the CD. You have only 50MB of storage space to store 20 minute clips of speech, 10 songs averaging three minutes long and a background sound loop. What sampling rate and depth should you use for the speech, for the music, and for the background sound? Why? Roughly calculate the file size totals for these specifications, and be sure that you end up with less than the 50MB of storage space allotted. Discuss your reasoning.
Answer :
MP3 format would be the choice for my entire audio file in video clip. This is because it has compressed without affecting the quality of sounds.
Speech - 96kbps bit rate for music, 128kbps bit rate for the sound quality as the soung quality is near to the CD quality, 128kbps bit rate for background sound loop.
Speech
60seconds * 96kbps = 5760 kb of data
5760/8 = 720kb (0.772mb)
0.72 *20 = 14.4mb
Music
180seconds *128kbps = 23040 kb of data
23040/8 = 2880kb (2.88mb)
2.88 * 10 = 28.8mb
Background song
300seconds * 128kbps = 38400 kb of data
38400/8 = 4800kb (4.8mb)
Total
14.4 + 28.8 + 4.8 = 48mb
what about of background song is multiply in 300 sec .there is no info of background song
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