
L64005 MPEG-2 Audio/Video Decoder Technical Manual
2-25
Final Rev F
Copyright 1996 by LSI Logic Corporation. All rights reserved.
it will be cleared and will not become set again until the
next audio frame containing a CRC error.
VRE
Video Reconstruction Error
2, R
If VRE is set, it indicates that the video decoder has been
unable to reconstruct the image in the allocated time
before its intended presentation time. This error can
occur if the encoder produces bitstreams that do not
properly meet the macroblock bit allocation constraint in
MPEG-2. When the audio decoder sets VRE, it also sets
the DER bit in Group 3.
CE
Context Error
1, R
When set, CE indicates that the bitstream’s syntax is ille-
gal in the current context. When the audio decoder sets
CE, it also sets the DER bit in Group 3.
VLCE
Variable Length Code or Run-Length Error
0, R
When set, VLCE indicates that the L64005 has found a
variable length code that is illegal in the current context,
or the combined run-length in a block exceeds 64. When
the audio decoder sets VLCE, it also sets the DER bit in
Group 3.
2.8.3
Group 6
Forward Anchor
Luma Base
Address
The Forward Anchor Luma Base Address Register supplies the base
address of the Forward Anchor frame luminance component. The
decoder uses this address to calculate offsets into the luma frame mem-
ory for picture reconstruction. The full address value stored in Registers
2 and 3 is in 64-byte resolution. These registers are read/write.
70
Forward Anchor Luma Base Address (LSB)
Register 2
60
Forward Anchor Luma Base Address (MSB)
Register 3