Which compression system is used for standard DVDs?

Standard DVDs utilize the MPEG2 compression system to encode video and audio data. MPEG2 was developed specifically for the transport and compression of high-quality video and audio content, making it an ideal choice for the limited storage capacity of DVDs compared to other media formats. This codec allows for the efficient reduction of file size while maintaining a level of quality that is suitable for the playback of feature-length films and television programs on DVD.

In the context of the other options, H.264 and HEVC (H.265) are more advanced codecs that are used for higher resolutions and more efficient compression but were developed after the DVD standard was established. AV1 is a newer codec designed primarily for streaming and is not applicable to DVD standards. Therefore, MPEG2 remains the foundational compression technology used in standard DVDs.