Product Details

The ADI MPEG-2 Video Decoder library for the Blackfin processor is a software implementation of an MPEG-2 video decoder, compliant with the INTERNATIONALSTANDARD ISO/IEC 13818-2: 2000(E), Information technology — Generic coding of moving pictures and associated audio information: Video, Second edition 2000-12-15. The ADI MPEG-2 Video Decoder is highly optimised to run on Analog Devices’ Blackfin processor family. It is a self-contained software module that is fully compliant with ISO/IEC13818-2 specification up to Main Profile and Main Level.

Features

  • Profile: Simple and Main Profile.
  • Level: Up to Main Level.
  • Frame Types Supported: I, P ,B
  • Progressive and Interlaced Support: Yes
  • Number of Reference Frames: 2
  • Entropy Decoder: VLD
  • Motion Vector: 1 MV per Macroblock
  • Motion Vector Accuracy: ½ pel
  • Conformance: Conformance to ISO/IEC 13818-2 Simple and Main Profile test vectors
  • Target Processor: ADSP-BF533, ADSP-BF54x, ADSP-BF561, ADSP-BF52x & code compatible across ADSP-BF5xx Blackfin processor family
  • Frame Work Dependencies: None
  • Release Format: Object code module with C source wrapper
  • Input Format – Elementary bit stream of MPEG-2 video object (ISO/IEC 13818-2)
  • Output Format – ITU-R BT.656 format or YUV4:2:0 planar format (when the legacy code is used) and RGB565, RGB888 or ITU-R BT.656 format when the custom code (external post-processing API) is used
  • Frame Rate: All frame rates specified by SP and MP standards
  • Bit Rate: All bit rates specified by SP and MP standards
  • Multi-channel: Fully re-entrant at frame level and multi-instancing capable
  • Color Conversion using external post-processing API: Example code for RGB565, RGB888 and ITU-R BT.656 color conversion. This has a great advantage of reducing EBIU bandwidth for the transfer of YUV420 data.
  • Post Processing - Color Space Conversion (YUV420 to ITU-R 656 ) and Clipping: User configurable function. - Scaling as desired by Aspect Ratio - User configurable function.
  • Scaling - User configurable function. Default scaling as desired by Aspect Ratio. Telecine (24 to 30 fps) –Only reported by the decoder. Deinterlacing - A simple de interlacer in ITU-R BT.656 mode only.

System Requirements

  • Windows XP Professional SP3 (32-bit only).
  • Windows Vista Business/Enterprise/Ultimate SP2 (32-bit only). It is recommended to install the software in a non-UAC-protected location.
  • Windows 7 Professional/Enterprise/Ultimate (32 and 64-bit). It is recommended to install the software in a non-UAC-protected location.
  • Minimum of 2 GHz single core processor, 3.3 GHz dual core is recommended.
  • Minimum of 1 GB memory (RAM), 4 GB is recommended.
  • Minimum of 2 GB hard disk (HDD) space is required.

Related Hardware

Performance Metrics

MIPS summary:

Code Memory (KiB) Data RAM (MB) Output Buffer (MB) Cycles/pel (MIPS)
  L1(KiB) L3 (MB)   Average Moving Average Peak
43.83 35.80 2.06 38 (390) 43 (446)

  • MIPS measured using a bit rate of 6 Mbps, 30 fps, 720x480 (D1) image size, ITU-R BT.656 output, NTSC format, optimal memory layout on ADSP-BF533 rev 0.5 processor.
  • Measurements done with CAS=3 for SDRAM, CCLK=594 MHz, SCLK=118.8 MHz.
  • 32 Kbytes of data cache and 16Kbytes instruction cache are enabled. The cache is set in "write back" and "large cache" (DCBS=1) mode. Memory DMAs are used.
  • Code memory includes all the codes related to the library including 16KB of ICache.
  • "Data RAM for L1" is for one instance, includes Stack, Scratch, Instance/Stage and does not include 32KB of DCache.
  • "Data RAM for L3" is for one instance for a D1 frame including frame buffers for the instance.
  • "Output Buffer" indicates the minimum memory (two PAL frame) required in the settings mentioned above. This is because PAL frame size is bigger than NTSC.
  • 1 MB = 1024 KiB; 1 KiB = 1024 Bytes.

NOTE: In deriving the "Moving Average Peak" value, an 8 consecutive frames sliding window was used. An average cycle count was measured for each window of frames, and the worst case average cycle from all the sliding window measurements was determined to be the "Moving Average Peak" value.

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Availability and Licensing

Each module supports the Analog Devices, Inc. (ADI) Blackfin or SHARC Processor family and is a licensed product that is available in object code format. Recipients must sign or accept a license agreement with ADI prior to being shipped or downloading the modules identified in the license agreement.

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