Please tell me what DC means in photography 3Q

Floating point computing power: 14G FLOPS (four times more powerful than PENTIUM II) Graphics chip: NEC Power VR2 (3 million PLOYGUN/S) Sound system: YAMAHA XG3D SOUND CHIP (64-channel ADPCM/PCM audio source Loopback stereo) Memory: 16MB main RAM, 8MB video memory, 2MB sound memory GD-ROM: 12X Number of colors: 16777216 colors MODEM: 33.6 KPS (external) OS (operating system): Microsoft WINDOWS CE 2.0 (WINDOWS CE is A dedicated operating system for handheld computers, this WINDOWS CE is dedicated to DREAMCAST. Because it can access the Internet, it also has a browser. I heard that it is an improved version of IE4 because the configuration of the host is very close to that of popular personal computers. In the future, it will be highly interchangeable with personal computers, and the transplantation speed will be very fast. Moreover, with its extremely powerful performance, some problems that previously occurred with next-generation machines (such as slow disk reading and poor 3D performance caused by skipping) will be eliminated. Serious, etc.) can be greatly improved. Direct Current, DC level, digital cameras. Cameras with CCD or CMOS as light sensors can be called digital cameras, which were launched by Sega in 1998. Game console. Specifications are as follows: CPU: HITACHI SH4 32bit * 4 Graphic Enginee built-in RISC (clocked: 200MHz 360MIPS/1.4 flops) Memory: Main memory: 16M (64bi SD-RAM *2) Display memory: 8M Audio memory: 2M display : 640×480 resolution color: 167,000 colors Chip: POWER VR2 (CG rendering performance, 3 million polygons per second, up to 5 million, special effects fully on) Special display performance: FOG (fog effect) BUMP MAPPING ( Processing bumpy image effects) ALPHA-BLENDING (256-level translucent effect) MIP MAPPING (automatically adjusts the mapping effect based on the distance of the polygon to prevent deformation) TRI-LINEAR FILTERING (straight-line penetration processing effect) ANTI ALIASING (image contours are smoother) ENVIRONMENT (picture mirror effect) SPECULAR EFFECT (image reflection light source effect) Sound: Super intelligent Sound Processor 64-channel ADPCM and XG format (built-in 32bit RISC CPU and EFFECT dedicated DSP) Operating system: Microsoft Windows CE Lite version DIRECTX6-7 about 2M Optical drive and software carrier: GD-ROM 12x speed optical disk drive, maximum capacity 1GB Peripherals: 33.6K-MODEM, ZIP-100M floppy drive Other functions: Music CD playback, clock, visual memory card After DC was defeated by PS2, Sega announced its transformation For software providers. First batch of sales: 150,000 units Global cumulative sales: 10.45 million units (2.25 million units in Japan, 8.2 million units overseas).

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