envsd_sds_091301.fm. 02 sept. 13, 2001 ibm39env422 IBM39ENV420 summary data sheet env sd digital video encoders features 1 of 6 features profiles and standards ? 4:2:2 pro?le at main level ? main pro?le at high level ? main pro?le at main level ? simple pro?le at main level image resolutions ? up to 720x512x30 fps ntsc ? up to 720x608x25 fps pal input image pre-processing ? horizontal noise ?lter ? vertical noise ?lter ? temporal ?lter ? supports horizontal image scaling ? supports 4:2:2 to 4:2:0 chroma conversion compression options ? 4:2:2 or 4:2:0 output chroma format ? supports ?eld or frame encoding ? variable gop structure ? external reference rate control ? supports dynamically variable parameters ? supports mpeg-2 or atsc user data insertion ? minimum encoding latency ? supports up to +/- 200h and +/- 128v search range ? programmable quantization tables output ? selectable es or pes output format ? produces up to 50 mbps memory ? single sdram memory interface ? requires a minimum 8 mb of 125 mhz sdram ? supports 2 bank and 4 bank memory chips technology ? 3.3v and 2.5v power supplies ? 1.6w nominal power dissipation ? ibm cmos sa-12e (0.18 m m) process technol- ogy ? 35 mm hpbga package description the ibm env sd video encoder chip offers flexibility and provides a compact solution for your sd appli- cation. the chip supports both mpeg-1 and mpeg- 2 real-time encoding. it handles multiple profiles and levels including 4:2:2 profile at main level and can encode picture resolutions up to 720x512 and 720x608 in ntsc and pal, respectively. the architecture offers a wide range of capability to encode sd images. the chip can compress images into either mpeg-2 4:2:2 profile for professional applications or main profile for broadcast applica- tions. it can deliver 4:2:2 or 4:2:0 chroma output for- mat. the user can program a search range of up to +/-200h and +/-128v based on their application needs. the chip outputs up to 50 mbps with superior image quality, making it desirable for high quality, high bit rate solutions. the programmable on-chip noise reduction filter provides an effective solution to achieve the best image quality at lower bit rates, making a highly desirable choice for broadcast and distribution appli- cations requiring vbr and statistical-multiplexing. dynamic changing of encoding parameters such as gop structure, bit rate control, and search range in real time provides added flexibility to optimize pic- ture quality at the available bandwidth. .
ibm39env422 IBM39ENV420 env sd digital video encoders block diagram 2 of 6 envsd_sds_091301.fm. 02 sept. 13, 2001 block diagram fig. 1. env block diagram pixel interface the pixel interface supports user selectable ccir 656 (8-bit) or ccir 601(16-bit) operation. a 27 mhz pixel clock is used for ccir 656 format. it also supports a clock rate of up to 13.5 mhz clock for the ccir 601 (16- bit) mode. this interface is designed to accept pixel data upon completion of the initialization process after power-on reset. phase lock loop the phase lock loop (pll) takes as input the 27 mhz reference clock, divides it into the system clock rate, and provides synchronized clock pulses to the entire chip. host interface connected to an external processor, the host interface communicates user input encoding parameters to the system through a 16-bit data bus and 8-bit address bus. data is entered via register writes or via dedicated picture and gop stacks. the host interface also offers a means of inputting certain commands to the encoders processor by mailbox, and the reading of select system registers for status and checking. sdram control me output interface pixel interface host interface processor phase lock loop dct/idct q/iq vle pixel data external processor external memory bit stream 27 mhz
ibm39env422 IBM39ENV420 env sd digital video encoders envsd_sds_091301.fm. 02 sept. 13, 2001 processor 3 of 6 processor a dedicated risc processor programmed to optimize encoding across a broad range of parameters. the processor acts as an engine for rate control, motion estimation, and motion compensation calculations. microcode-based field upgrades are available to the customer and are a key feature of the env sd video encoder. sdram control a single memory interface designed to support 125mhz, 32-bit sdram. the encoder requires a minimum of 8mb of external memory for full ipb encoding. motion estimation (me) a hierarchical motion estimation and compensation unit capable of searching up to +/-200 horizontal pixels and +/-128 vertical pixels. the me unit performs past reference searches in the case of p and b pictures, and future reference and bi-directional searches in the case of b pictures. adaptive frame/field motion estimation with interpolation for 1/2 pixel refinement is performed on a per macroblock basis. dct/idct/q/iq/vle dedicated hardware function for coding the bitstream and creating reconstructed reference data for motion estimation and compensation. the quantizer (q) and inverse quantizer (iq) units are capable of holding up to eight 8x8 user quantization tables (2 intra luma, 2 non-intra luma, 2 intra chroma, 2 non-intra chroma). output interface designed for programmable output modes and speeds up to 50mb/sec. outputs the bitstream in either es or pes format, with encoding statistics available at the output interface.
ibm39env422 IBM39ENV420 env sd digital video encoders environmental and electrical specifications 4 of 6 envsd_sds_091301.fm. 02 sept. 13, 2001 environmental and electrical speci?cations the env sd chip is designed to operate from 0 to 70 degrees c ambient environment. note: the allowable ambient temperature range speci?ed is based on the module mounted to a 2-signal/2-power plane card with the speci?ed air?ow on both sides of card, vertical orientation. the drivers and receivers are compatible with 3.3 volt-tolerant technologies. table 1. operating range/ratings of env sd parameter value units vdd (supply voltage)(maximum) 2.625 volts vdd (nominal supply voltage) 2.5 5% volts vdd2 (supply voltage)(maximum) 3.465 volts vdd2 (nominal supply voltage) 3.30 5% volts system clock 27 mhz ambient temperature range (operating conditions) 0 - 70 ?c operating temperature range (chip tj) 0 - 100 ?c storage temperature range -55 to 125 ?c air flow (minimum) 0.5 meters/sec power dissipation (nominal) 1.6 watts power dissipation (maximum) 1.8 watts table 2. physical information of sd pbga package parameter value unit module dimension 35x35 mm module height 2 mm ball pitch 1.27 mm ball diameter 0.75 mm
ibm39env422 IBM39ENV420 env sd digital video encoders envsd_sds_091301.fm. 02 sept. 13, 2001 copyright and disclaimer 5 of 6 copyright and disclaimer copyright international business machines corporation 2001. all rights reserved printed in the united states of america september, 2001 the following are trademarks of international business machines corporation in the united states, or other countries, or both: ibm ibm logo other company, product, and service names may be trademarks or service marks of others. all information contained in this document is subject to change without notice. the products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. the information contained in this document does not affect or change ibm's product specifications or warran- ties. nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of ibm or third parties. all information contained in this document was obtained in specific environments, and is pre- sented as an illustration. the results obtained in other operating environments may vary. the information contained in this document is provided on an "as is" basis. in no event will ibm be liable for damages arising directly or indirectly from any use of the information contained in this document. ibm microelectronics division 1580 route 52, bldg. 504 hopewell junction, ny 12533-6351 the ibm home page can be found at http://www.ibm.com the ibm microelectronics division home page can be found at http://www.chips.ibm.com envsd_sds_091301.fm.02 sept. 13, 2001
ibm39env422 IBM39ENV420 env sd digital video encoders revision log 6 of 6 envsd_sds_091301.fm. 02 sept. 13, 2001 revision log 6 rev. date contents of modi?cation sept. 04, 2001 initial release (00) sept. 06, 2001 minor corrections to text, added figure and table numbers (01) sept. 13, 2001 minor changes to text requested by ibm attorney (02)
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