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MB87L2250

MPEG2 Transport, Video and Audio Decoder with integrated 32-Bit RISC CPU

Fujitsu 

Product Profile

October 1998

Edition 1.1

MB87L2250 - MPEG2 Decoder

2.4. BUFFER MANAGEMENT

• Individual buffer allocation for each stream

- Video Buffer / Audio Buffer / Teletext Buffer / 29 Section Data Buffer

• Section buffer types

- circular buffer

- buffer size individually programmable for each stream between 256 byte and 32 Kbytes

- each buffer with write and stop pointers for buffer management

- stop pointer software controlled

- IRQ generation and stream disable in case of buffer overflow (programmable)

2.5. Video Decoder

• Decoding of MPEG-2 Video ML@MP ISO/IEC 13818-2, MP@LL, SP@ML

• Error concealment using syntax checker and concealment vectors

• MPEG-1 Bit stream inside ISO-11172-2 decoded DVB compliant

• Supports 3:2 pull down

• 2.5 Frame architecture

2.6. Video Output

• Supports different Video-DAC’s (CCIR/ITU 601, CCIR/ITU 656)

• 8 bit Y, Cr, Cb

• 4:2:0 or 4:2:2 output format

• Vertical filtering

- 4:2:0 -> 4:2:2 conversion (chrominance up sampling),

- letterbox for 4:3 monitors

- SIF-upsampling (chrominance and luminance up sampling)

• Horizontal filtering with 8 tap poly phase filter

- pan/scan

- DVB full screen up sampling

• digital insertion for Teletext into the VBI

• picture down scaling (75% picture size)

2.7. OSD

• no limitation of the number of OSD-regions (depends only on the available memory)

• individual mode and colour palette for each defined OSD region

• load of colour map for each region programmable

• 4 bits mix weight

• 256 colours (8 Bit), 64 colours (6 Bit), 16 colours (4 Bit), 4 colours (2 Bit) mode supported

• full resolution or SIF format

• in one region transparent, mixed and OSD-only possible

• memory save mode to increase OSD memory

• independent or same bit map for even / odd-field.

2.8. Audio Decoder

• ISO/IEC 11172-3 (MPEG 1 Audio)

• ISO/IEC 13818-3 (MPEG 2 Audio in two channel mode)

• Layer I & Layer II Decoding

• Single / Dual / Joint Stereo / Stereo

• Sampling Rates: 32 KHz / 44,1 KHz / 48 KHz / 16 KHz / 22.05 KHz / 24 KHz

• All bit rates supported

• CRC error detection

• Error concealment

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