Lecture 11 & Chapter 14: Digital Video Data Sizing 

         Firstly, i learned what is data rate. Data rate is the rate at which information being transferred, it is expressed in terms of [amount of information] per [unit of time]. Example, Data rate used to describe the speed of a hard drive is Megabytes/second. For compressed audio files, kilobytes/second is used. When a data rate is determined, you can calculate the estimate amount of hard drive space needed to store the video.

      Secondly, i learned how to calculate the file size of an uncompressed digital video & converting bytes to gigabytes. Then how to calculate the file size of an uncompressed audio file.

     The formula is as follows:                                                 Raw video data size

     = frame size (width X height) * frame rate (fps) * color depth            (in bytes) * time (in seconds).

      Converting bytes to gigabytes. 

    

8 bits = 1 byte

1 kilo(bit/byte) = 1,024 (bits/bytes)

1 Mega(bit/byte) = 1,048,576 (bits/bytes)

1 Giga(bit/byte) = 1,073,741,824 (bits/bytes)

             

      The formula is as follows: 

        8-bit mono  Second*KHz = Size

       16-bit mono (Second*KHz)*2= Size

       8-bit stereo (Second*KHz)*2= Size

       16-bit stereo ([Second*KHz]*2)*2= Size

       16-bit stereo ([Second*KHz]*2)*6= Size

    

            Finally, i also learned how to determine the factors to be            considered in graphics selection for a multimedia project. Which        are Purpose The aim which the product has been produced,             Quality Product must reach aim of the quality as specified by          the client, and Cost depend on the quality and aim.