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ADV612BST Folha de dados(PDF) 3 Page - Analog Devices |
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ADV612BST Folha de dados(HTML) 3 Page - Analog Devices |
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3 / 46 page  ADV611/ADV612 –3– REV. 0 The ADV611/ADV612 are real-time compression integrated circuits designed for remote video surveillance or closed circuit television (CCTV) applications. The most important feature of these two devices is the “Quality Box.” With this feature the user can define a box of any size and location within each field of video that will be compressed at full contrast while the re- mainder outside the box, or background of the image, is com- pressed at a lower level of contrast. The background contrast level is controlled by the user. The lower the contrast level, the more the image will be compressed. The objective in a given Table II. Differences Between the ADV601, ADV601LC, ADV611 and ADV612 ADV601 ADV601LC ADV611 ADV612 Bits per Component 10 8 8 8 DSP Serial Port Yes No No No Package 160 PQFP 120 LQFP 120 LQFP 120 LQFP Pin Assignments Unique Unique 98% Similar to ADV601LC 98% Similar to ADV601LC Temperature Range 0 °C to +70°C0°C to +70°C0°C to +70°C –25 °C to +85°C θ JA 31 °C/W 35 °C/W 35 °C/W 35 °C/W θ JC 7.5 °C/W 5 °C/W 5 °C/W 5 °C/W Field Rate Reduction Software Software Hardware Hardware Stall Mode No No Yes Yes Field Truncation No No Yes Yes Field Size Register No No Yes Yes Field Bit Polarity Control No No Yes Yes Evaluation Board VideoLab VideoPipe CCTVPIPE CCTVPIPE Target Applications Professional Consumer CCTV Industrial CCTV Figure 3. application is to adjust the background contrast to a level that ensures both a recognizable and useful background as well as the highest possible compression. Figure 3 shows how this qual- ity box appears in final video. The ADV611/ADV612 is housed in a plastic LQFP package suitable for cost-sensitive commercial applications. COMPARING THE ADV6xx FAMILY VIDEO CODECS The ADV6xx video codecs support a range of interface, pack- age, and compression features. Table II compares these codecs: Original Video Image Image after compression/decompression shown with different box size and position PROGRAMMABLE QUALITY BOX VARIABLE CONTRAST BACKGROUND |
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Descrição semelhante - ADV612BST |
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