Subsection 1.1. Information representation for Computer Science, A Level - revisedeck

1.1. Information representation

A subsection of Computer Science, 9608, through 1. Theory Fundamentals

Listing 10 of 54 questions

Anne is downloading a sound file from a web server. She had the choice of a sampling rate of 44.1 kHz or 98 kHz before she downloaded the sound file. Explain the differences between the two sound files stored on the server.

9608_w20_qp_11

THEORY

2020

Paper 1, Variant 1

View

Joanne wants to record sound files and videos for uploading to a social media website. The following table contains terms about sound representation and encoding. Complete the table by writing the definitions for each term. Term Definition Sampling Sampling resolution Sampling rate Joanne records a short video using interlaced encoding. Describe what is meant by interlaced encoding.

9608_w21_qp_11

THEORY

2021

Paper 1, Variant 1

View

Daniel is creating a sound file for a school project. Daniel records the sound using a sampling rate of 44.1 kHz and a sampling resolution of 16 bits. State what is meant by a sampling rate of 44.1 kHz. State what is meant by a sampling resolution of 16 bits. Daniel needs to write a report about the sound he is using for his project. He will use a keyboard to write this report. Describe the basic internal operation of a keyboard.

9608_w21_qp_13

THEORY

2021

Paper 1, Variant 3

View

When recording a video, state what is meant by frame rate. Video streaming can use either interlaced encoding or progressive encoding. Describe what is meant by the following terms. Interlaced encoding Progressive encoding Name the video terms described below: Description Term Pixels in two video frames have the same value in the same location. There is duplication of data between frames. A sequence of pixels in a single video frame have the same value. Give one file technique that could be applied when either of the two features, described in part , are present.

9608_w16_qp_12

THEORY

2016

Paper 1, Variant 2

View

Questions Discovered

54