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    • 10. 发明申请
    • Sampling frequency conversion apparatus
    • 采样变频装置
    • US20050195929A1
    • 2005-09-08
    • US11100128
    • 2005-04-06
    • Nobuyuki YasudaKazunobu Ohkuri
    • Nobuyuki YasudaKazunobu Ohkuri
    • G10L19/00H03H17/00H03H17/06H04B14/02H04B14/04H04H5/00H04H20/89H04L7/02H04L25/05H04B1/38
    • H03H17/0628H03H17/0621H04B14/026H04H20/89H04L25/05
    • A sampling frequency conversion apparatus which easily controls the phase difference (time difference) between the input data and the output data in converting the sampling frequency, and comprises storage means 13 for continuously writing the input data or the data obtained by over-sampling the input data and for continuously reading out the data written maintaining a predetermined address difference relative to the write address, and interpolation processing means 14 for interpolating the data read out from the storage means 13 to obtain data of which the sampling frequency is converted. In converting the sampling frequency, an address difference between a write address and a read address in the storage means 13 is optimized, the address difference being optimized without limitation for a predetermined period of time from the start of supplying the input data and, then, being optimized by imposing a predetermined limitation after the passage of the predetermined period of time.
    • 一种采样频率转换装置,其在转换采样频率时容易地控制输入数据和输出数据之间的相位差(时间差),并且包括用于连续写入输入数据或通过对输入进行过采样而获得的数据的存储装置13 数据,并连续地读出相对于写入地址保持预定地址差的写入数据;以及内插处理装置14,用于内插从存储装置13读出的数据,以获得采样频率被转换的数据。 在转换采样频率时,优化存储装置13中的写入地址和读取地址之间的地址差异,在从提供输入数据开始的预定时间段内对地址差进行优化,而不限于此, 通过在经过预定时间段之后施加预定的限制来优化。