The SEDRIS Data Representation Model
APPENDIX A - Classes
Sound

Class Name: Sound

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies a digital representation of an acoustic phenomenon.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. A <Sound> instance represents the sound of a siren that can be used by different <Model> instances representing environmental objects such as ambulances, fire engines, or police vehicles.

FAQs

How can a data provider reference a <Sound> instance in a transmittal?

See <Sound Instance>.

Constraints

Associated by (one-way)

Composed of (two-way)

Composed of (two-way metadata)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_String name; 4
SE_Sound_Format sound_format; 5
SE_URN sound_urn; 6
SE_Float duration; 7
SE_Float sampling_rate; 8
SE_Byte_Positive bits_per_sample; 9
SE_Byte_Positive channel_count; 10
SE_String method; 11

Notes

Composed of Notes


Classification_Data

If provided, the <Classification Data> component identifies the phenomenon represented by the <Sound> instance.


Identification

If provided, the <Identification> component may be used to provide a more detailed description than that specified by the name field.


Lineage

If provided, the <Lineage> component specifies either information about the events and/or source data used in constructing the <Sound> instance or lack of knowledge about lineage.

Fields Notes

name

The name field specifies a meaningful short name.

sound_format

The sound_format field specifies the sound format of the resource (see C.3 Sound_Format references).

sound_urn

The sound_urn field specifies a SEDRIS sound URN as defined in SE_URN.

duration

The duration field specifies the length of the sound clip in seconds.

sampling_rate

The sampling_rate field specifies the number of samples per second (e.g., a standard Compact Disc has a sampling of 44.1 kHz, which is a sampling rate of 44100).

bits_per_sample

The bits_per_sample field is also called sample size or quantization (e.g., a standard Compact Disc has 16 bits per sample).

channel_count

The channel_count field specifies the number of sound channels.

NOTE  A channel_count of 1 = monophonic and 2 = stereophonic.

method

The method field specifies the encoding scheme and compression scheme used, if any.


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Last updated: July 26, 2006 Copyright © 2006 SEDRIS