DVD-VR

The DVD-VR standard defines a logical format for video recording on DVD-R, DVD-RW, and DVD-RAM style media, including the dual layer versions of these media. As opposed to media recorded with the DVD+VR recording standard, the resulting media are not DVD-Video compliant, and do not play back in some DVD-Video players. Most DVD video recorders in the market that support DVD-R, DVD-RW, or DVD-RAM media record to these media in DVD-VR mode, as well as in a DVD-Video compliant mode. It is possible to use the DVD-VR format with DVD+R and DVD+RW media, but no examples are known other than some PC based recording utilities.

The standard was introduced in 1999 by the DVD Forum, and licensing is managed by the DVD Format/Logo Licensing Corporation [1]. For each of the supported media, the full recording standard consists of three parts being: Physical Specifications (Part 1), File System Specifications (Part 2), and the Video Recording Specifications (Part 3).

The DVD-VR specification allows implementing the following main features:

DVD-VR recorded media are not DVD-Video compliant, and do not play back in all DVD players. Some more recent DVD players, and also the Sony PlayStation 2, can play discs recorded in the DVD-VR format.

The DVD-VR standard defines a logical format for recording and editing of video on a DVD disc. Instead of modifying the DVD-Video standard, a separate standard was created to allow for this.

Video is recorded as an MPEG program stream. Video resolution depends on the recording quality and the video format used. Multiple audio encodings are allowed including MPEG Audio, Dolby Digital (AC-3) and Linear PCM.

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