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Cambridge IGCSE Computer Science practice

Paper 1 structured question: Text, sound and images

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Attempt questionText, sound and images revisionRevise the key idea

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Text, sound and images

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Paper 1Computer Systems4 marks

The impact of sample rate and resolution on sound quality is significant.

Description

Impact of Sampling

When sound is recorded, the sample rate and resolution determine the quality of the audio. Higher sample rates and resolutions yield better fidelity but also increase file sizes significantly.

  1. a

    Explain How do sample rate and sample resolution affect sound quality?

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 1 structured question: Text, sound and images

Paper 1Computer Systems1 marks

Description

Sound Representation

Sound is digitized by sampling sound waves at specific intervals, converting them into binary data. The sample rate is the number of samples taken per second, while sample resolution is the number of bits used for each sample. Higher values in both lead to better sound quality but larger file sizes.

  1. a

    State What does sample rate refer to?

    Aim for approximately 1 distinct marking point.

    [1]