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● 彩色视频信号的数字化过程中,图像的子采样技术通过减少 (39) 的采样频率来降低数据量。以下属于标准子采样方案的有 (40) ,其中子采样方案 (41) 得到的数据量是相同的。 

      ① 4:2:2   ②2:0:0   ③ 4:1:1   ④ 4:4:4   ⑤4:2:0

(39)

  • A. 亮度信号   
  • B. 灰度信号 
  • C. 色度信号 
  • D. 同步信号    (40)
  • A. ①②③④   
  • B. ①②④⑤     
  • C. ②③④⑤  
  • D. ①③④⑤    (41)
  • A. ①和②     
  • B. ①和④     
  • C. ②和③    
  • D. ③和⑤
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