1 Digital Media Foundations Free Online FlashCards

What does a digital media file format define?

A file format defines how information and related data are organized in a file.

What does a codec do?

A codec encodes and decodes particular media data, often to reduce its size.

What is a media container?

A container packages one or more streams, such as video, audio, and captions, along with timing and metadata.

How is a raster image represented?

A raster image is a grid of pixels; its pixel dimensions give the grid’s width and height.

What does audio sample rate measure?

Sample rate is the number of audio samples recorded per second. For example, 44.1 kHz means 44,100 samples per second per channel.

What does video frame rate measure?

Frame rate is the number of video frames shown per second.

How do lossless and lossy compression differ?

Lossless compression preserves the original data so it can be reconstructed exactly; lossy compression discards some information to make files smaller.

How does a working file differ from a delivery file?

A working or master file may preserve editable project information; a delivery file is prepared for a particular audience or platform.

What makes media interactive?

Interactive media combines media content with user input and system responses, such as controls that let users navigate or affect a project.

Why is metadata useful for media files?

Metadata describes or helps manage files, supporting their identification, processing, quality control, retrieval, and long-term management.

What should a media project define first?

Define what the media should communicate, who will use it, and where it will appear; these decisions guide the project’s purpose and success criteria.

How should accessibility shape media production?

Plan accessibility from the start. Depending on the content, this can include image text alternatives, captions, audio transcripts, and descriptions of important visual information.