faac-1.25.rar音频编解码器demo-faac-1.25.rar audio codec demo

C codes and programming Embedded system

using event and delegate to perfoem clock

Main program for decompression

测试压缩一个425K的文件需要9.4秒，压缩后的文件为177K。如果要提高压缩速度，那么算法的复杂度就得增加了。 -compression testing of a 425K file 9.4 seconds, compressed the files to 177K. If we are to raise compression speed, then the algorithm complexity must increase.

将多个文件的内容合并为一个文件，被合并文件的文件名由命令行参数提供。-The contents of multiple files into one file, be merged file name from the command-line parameter.

小波变换，实现图像压缩，不错的东西大家下来，-Wavelet transform, to achieve image compression

用pb10和myzip.dll实现的压缩解压程序，以及myzip.dll的详细文档。-Pb10 and with myzip.dll realize compression decompression procedures, as well as detailed documentation myzip.dll.

【文本与二值图像的游程】1. 文本游程压缩的原理 对重复字段采用3符号标识法：(1) 重复提示符,比如@,#等；(2) 游程长度参数或重复次数,若用一个字节表示,最大长度可为255个重复字；(3) 重复字符。以上三部分合称为重复因子。可见要获得压缩效益，重复字符应在3个以上。2. 图像游程压缩的原理 对于二值图像，原始数据为零一矩阵，压缩时逐行处理该矩阵：(1) 连续n个1，表示为+n；(2) 连续n个0，表示为-n。-text and binary image-- an outbound trip. Yu Cheng text compression principle on repeated field using three symbols logo Act : (a) repeat prompt, such as @,#, etc.; (2) Run-length parameters, or the number of repeat, if using a byte, the largest the length of 255 to repeat the word; (3) repeat characters. More than three as part of a repeat factor. Visibility to gain compression efficiency, duplication of characters in three more. 2. Run-image compression for the principle of two binary images, a zero original data matrix, progressive compression deal with the matrix : (1) n a row, n; (2) consecutive n 0, expressed as-n.

图像的特技显示，包括马赛克、渐隐、渐显、百叶窗、栅格、扫描-Stunt show images, including mosaics, fade,渐显, shutters, raster scanning