L64105 LSI Logic Corporation, L64105 Datasheet - Page 240
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L64105
Manufacturer Part Number
L64105
Description
Mpeg-2 Audio/video Decoder
Manufacturer
LSI Logic Corporation
Datasheet
1.L64105.pdf
(454 pages)
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7.7 Summary
7-12
Equation 7.5
The following example shows the space consumed by the display B
frame store in a PAL system. The example uses 44 segments with a
Chroma Line Repeat Display mode.
Equation 7.6
Table 7.4
for an MPEG-2 stream displayed in NTSC format.
.
Table 7.4
Memory Interface
Item
Video ES Channel Buffer
Audio ES Channel Buffer
Video PES Header Channel Buffer
Audio PES Header/System Channel Buffer 512
OSD Storage
Anchor Luma Frame Store 1
PAL B Frame Luma
PAL B Frame Chroma
Note:
Total Frame Store Size
Chroma Frame Store Memory
shows an example of buffer and frame store SDRAM allocation
This is approximately 2.61 frame stores.
Example NTSC SDRAM Allocation with Frame Store
(720 x 480)
With Chroma Field Repeat Display Mode
Reduced Memory Frame Store Size Example for PAL
=
44 720 8
=
=
44 720 4
+
2 Anchor Frames
253440
=
Pixel Width Line Height 2
=
+
253,440 bytes
126720
=
126,720 bytes
Size (bytes)
229,376
4,096
512
Optional
345,600
=
720 576 1.5
1,624,320 bytes
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