PNX1502E,557 NXP Semiconductors, PNX1502E,557 Datasheet - Page 649
PNX1502E,557
Manufacturer Part Number
PNX1502E,557
Description
IC MEDIA PROC 300MHZ 456-BGA
Manufacturer
NXP Semiconductors
Specifications of PNX1502E,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.23 V ~ 1.37 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Ram Size
-
Lead Free Status / Rohs Status
Not Compliant
Other names
935274744557
PNX1502E
PNX1502E
PNX1502E
PNX1502E
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
PNX1502E,557
Manufacturer:
NXP Semiconductors
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10 000
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1. Introduction
1.1 Features
The MPEG-2 Variable Length Decoder (VLD) consists of two Write DMA channels
that write back data to main memory; one for Run Length (RL) data and one for
Macro Block Header (MBH) data.
The VLD decodes the Huffman encoded MPEG-1 and MPEG-2 (main profile and
main level) video elementary bitstreams. The VLD unit, enabled by the CPU, operates
independently during the slice-level decoding. The remaining bitstream decoding is
carried out by the TriMedia (TM3260) CPUs and appropriate software. The VLD also
assists the CPU and outputs a stream of macroblock headers and a stream of run-
level pairs. Run-level pair expansion, produced by the VLD into actual quantized DCT
values and their subsequent rearrangement into a natural order, is carried out by the
TM3260.
The TM3260 CPUs are also responsible for restoring or “dequantizing” the quantized
DCT values by multiplying them by the corresponding values in the 8x8 DCT
quantization matrix. The TM3260 optionally performs the frequency domain filtering
in association with the half-resolution mode, and perform the inverse discrete cosine
transformation on each of the 8x8 dequantized blocks.
The TM3260 CPU reconstructs the final video samples from the macroblock header
data decoded by the VLD, the reference frame data stored in main memory, and the
differential data previously computed.
After initialization, the TM3260 CPU controls the VLD through its command register.
There are currently nine commands supported by the VLD:
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Chapter 21: MPEG-1 and MPEG-2
Variable Length Decoder
PNX15xx Series Data Book – Volume 1 of 1
Rev. 3 — 17 March 2006
Shift the bitstream by some number of bits.
Parse a given number of macroblocks, one row, or parse continuously without
stopping at the slice header.
Search for the next start code.
Reset the Variable Length Decoder.
Initialize the VLD.
Search for the given start code.
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