发明名称 |
Image data compression device and encoder |
摘要 |
An image data compression device includes: a quantization section which quantizes image data based on a quantization parameter; a FIFO buffer section in which quantized data for at least N frames (N is an integer larger than one) is buffered; an encoded data generation section which reads the quantized data from the FIFO buffer section, and generates encoded data; a rate control section which changes a quantization step by using a data size of the encoded data; and a frame skip section which skips a quantization processing of the quantization section. The rate control section calculates the quantization parameter by using an average data size of the encoded data for previous N frames, and the frame skip section performs the skip processing when a frame in which the quantization parameter is greater than a threshold continues equal to or more than a number of times for a number threshold.
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申请公布号 |
US2005123050(A1) |
申请公布日期 |
2005.06.09 |
申请号 |
US20040981690 |
申请日期 |
2004.11.05 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
KONDO YOSHIMASA;OSADA KYOICHI |
分类号 |
H04N7/30;H04N7/12;H04N7/26;H04N7/32;H04N7/34;H04N7/46;H04N7/50;(IPC1-7):H04N7/12 |
主分类号 |
H04N7/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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