| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an appropriate system clock even when PCR (Program Clock Reference) and SCR (System Clock Reference) are unsuitable as a reference signal for generating a system clock. <P>SOLUTION: When a stream is decoded, an STD buffer control section 144 detects the effective volume of data of a buffer for temporarily storing that stream, a function generating section 145 generates a specified function based on the detected volume of data, and the oscillation frequency of a VCO 141 in a PLL generating a system clock being employed at the time of decoding a data stream is controlled. A system clock having an appropriate frequency is thereby attained and overflow and underflow of the STD buffer are prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
