发明名称 |
Image data compression device and encoder |
摘要 |
An image data compression device including: a quantization section which quantizes image data; a FIFO buffer section which buffers quantized data for N frames (N is an integer greater than one) from the quantization section; an encoded data generation section which reads the quantized data from the FIFO buffer section asynchronously from writing into the FIFO buffer section, and generates encoded data; and a rate control section which changes a quantization step of the quantization section by using the data size of the encoded data. The rate control section calculates a quantization parameter to be equal to or less than an upper threshold of the quantization parameter or to be equal to or greater than a lower threshold of the quantization parameter by using an average data size of the encoded data for preceding N frames.
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申请公布号 |
US7369708(B2) |
申请公布日期 |
2008.05.06 |
申请号 |
US20040981674 |
申请日期 |
2004.11.05 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
KONDO YOSHIMASA;OSADA KYOICHI |
分类号 |
G06K9/36;H04N7/30;G06K9/46;H04N7/12;H04N7/26;H04N7/32;H04N7/50 |
主分类号 |
G06K9/36 |
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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