Samsung DVD-R157 Service Manual page 102

Circuit Operating Descriptions
5) Interrupt controller
· 62 interrupt sources(Watch dog timer, 4 Timers, UARTs, 8 External interrupts, IIC, IIS, SPI, IR,...)
· Edge detect mode on external interrupt source.
· Programmable polarity of rising and falling.
· Supports FIQ (Fast Interrupt request) for very urgent interrupt request.
6) Video pre-processor
· Noise Reduction by Motion-compensated Temporal Filtering.
· Bitmap Generation for Motion Estimation of MPEG Encoder.
· Scene Change Detection.
7) MPEG video encoder
· Encodes MPEG1 & MPEG2 video stream (MP@ML)
· Efficient Motion Estimation by reduced calculation and accurate Motion Vector Search
8) MPEG video decoder
· Decodes MPEG1, MPEG2 (MP@ML) & DivX/MPEG4 video stream(ASP)
· Error detection and autonomous error concealment.
9) Audio DSP
· Decodes Dolby AC-3, MPEG1, MPEG2, DTS and WMA
· Supports down mix
· MAC2424 for audio signal processing
- 24-bit high performance fixed-point DSP coprocessor, 24x24 MAC operation in 1 cycle
- 2 multiplier accumulator registers, 4 general accumulator registers, and 8 pointer registers
13-6 Samsung Electronics