O Calculate the total number of bits used in downloading a 50 MB video file. Also calculate the time (in minutes) it takes to download the same video file, if the download link is a telephone line with 9600 baud rate. Assume 8 - bits of data per character, 1 – start bit, 1 - stop bit, and 1 parity bit. -

O Calculate the total number of bits used in downloading a 50 MB video file. Also calculate the time (in minutes) it takes to download the same video file, if the download link is a telephone line with 9600 baud rate. Assume 8 - bits of data per character, 1 – start bit, 1 - stop bit, and 1 parity bit. -

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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A movie was shot in 150 fps. The movie lasted for 30mins. The movie was played in a vertical and horizontal pixel of 720 × 720 respectively. The bit depth for the video was 16 bit. This same video was shot having an audio sampling rate of 44100 Mhz with an audio bit depth of 32bit. The producer of the video decided to test the quality of the audio for the movie with a surround 5.1 channel audio system. 15 marks i) Calculate the audio file size in bits and explain its effect on the video file. ii) Calculate the file size of the video in Megabytes (Mb) iii) Calculate the bit rate of the video file and explain the effect of the value on processing of the file
a. Huffman coding assigns codes to characters such that the length of the code depends on the relative frequency or weight of the corresponding character. Thus, it is a variable-length code. If the estimated frequencies for letters match the actual frequency found in an encoded message, then the length of that message will typically be less than if a fixed-length code had been used. Due to such advantages, RadiantRay Networking Sdn Bhd uses Huffman compression technique to encode the message before transmitting over the network to its customer. Suppose the message contains the following strings "a fast runner never be afraid of dark“ a. How many bits may be required for encoding the message without using Huffman coding? b. Create an Huffman table indicating the number of character bits, frequencies and the code used in transmission of the message (space is also counted as a character) c. What is the total size of the massage to be sent?
If we record a song that is one minute long using 16 bits for each sample and is sampled at 44.1 KHz in mono channel, without any metadata or compression, how large would the file be? Express your answer in MB. Show you work. (Note that 1KHz means 1000Hz while 1K means 1024 (and IM means 10242) for capacity calculations.)
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