DcVD
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[edit] Dreamcast Video Disc [ DcVD ]
The proprietary video format based off the Mpeg SOFDEC exclusively for the Sega Dreamcast. Including custom encoded video in Sofdec (.sfd) format as well as the mpeg sofdec program on a cd prepared for self-boot.
At maximum bitrates the DC can handle, it is possible to fit approx. 38 minutes of near DVD quality video at true 480p60 EDTV on one CD. For true progressive scan, DC VGA adapter required.)
[edit] Kompression Dreamcast Video Disc [ kDcVD ]
Using lower overall bitrates combined with the "Notch" Quantize Matrix allow up to 2 hours of near DcVD quality video on one 80 minute CD.
[edit] Video Specifications
Format: Mpeg-1 (.m1v)
FrameRate: 23.976fps, 24fps, 25fps, 29.976fps, 30fps, 60fps (Match Source FrameRate)
Resolution:
- 640x272p (2.35:1 True Widescreen; No letterboxing)
- 640x480p (4:3, Widescreen material letterboxed)
- 352x240p (4:3, only for Fullscreen material)
DcVD Bitrate:
- Variable Bitrate (VBR)
- Minimum Bitrate: 64kbps
- Maximum Bitrate: 3,000 kbps ( 3 mbps )
- Average Bitrate: 2,200 kbps ( 2.2 mbps )
kDcVD Bitrate:
- Variable Bitrate (VBR)
- Minimum Bitrate: 64kbps
- Maximum Bitrate: 3,000 kbps ( 3 mbps )
- Average Bitrate: 656kbps ( approx. 120 minutes / CD ) through 952kbps ( approx. 90 minutes / CD )
Video Buffer Size (VBV): 196kb
GOP Structure: I P pictures only
DcVD Quantize Matrix: Default
kDcVD Quantize Matrix: "Notch" quantize matrix ( copyright Karl Wagner )
[edit] Audio Specifications
DcVD: Linear PCM 1536kbps (.wav) compressed into Sofdec Audio 44khz 396kbps ( .sfa CD Quality )
kDcVD: Linear PCM 1536kbps (.wav) compressed into Sofdec Audio 22khz 99kbps ( .sfa TV Quality )
[.m1v and .sfa must be multiplexed into .sfd Sofdec data (not explained here).]
