| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sampling clock generation circuit and teletext broadcasting data sampling circuit, in which a more accurate sampling clock can be generated from an input signal, without being affected by the accuracy of a slice level. <P>SOLUTION: A maximum value detection circuit 1001 and a minimum value detection circuit 1002, respectively detect maximum value peaks and minimum value peaks, in which CRI included in a text signal of teletext broadcasting, becomes "0" or "1". A sampling clock reference position generation circuit 1005 calculates the reference timing therefrom for identifying the phase of the sampling clock. The reference timing is the start timing of the sampling clock. Furthermore, a pulse generator 1006 generates a sampling clock, by using a pre-registered cycle with the sampling clock reference timing as the reference. <P>COPYRIGHT: (C)2007,JPO&INPIT |
