L64105 LSI Logic Corporation, L64105 Datasheet - Page 283

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

The Rip Forward Mode is intended to be used in applications where not
every picture that is decoded needs to be displayed. The picture to be
displayed is specified in separate registers. These registers are read by
the Video Interface. See the Display Override Mode bits in Register 265
(page
4-59) and the Override Display Start Address in Registers 285,
286, 287, and 288
(page
4-68).
Also, during the Display Override Mode, the host must specify the
Override Picture Width in Register 283. The Pan and Scan from
Bitstream bit in Register 279 must be cleared, and pan-and-scan values
(if any) must be supplied by the host in Registers 276 through 281. The
3:2 Pulldown from Bitstream bit in Register 275 must be cleared, and the
display must be specified completely by the host using the Host Repeat
First Field and Host Top Field First bits in Register 275.
After the Rip Forward Mode is turned off, the reconstruction of the next
picture begins at the boundary of the following even display field. This
causes resynchronization between the reconstruction and the display
process.
Figure 8.7
shows an example of Rip Forward Mode with Display
Override.
Trick Modes
8-41