| 摘要 |
<p>A processor (4) receives (I1,I2) a first audio and/or video input signal (A1, V1), and a second audio and/or video input signal (A2, V2; A1b, A1c, A3, A5). A comparator (41) compares the first audio or video input signal (A1; V1) and the second audio or video input signal (A2, V2; Alb, Alc, A3, A5), respectively, to detect a match between the first audio signal (A1) and the second audio signal (A2) or the first video signal (V1) and the second video signal (V2). A selector (42) supplies a selected signal (AS) which is the second audio or video input signal (A2, V2) if the match is detected or the first audio or video input signal (A1, V1) otherwise.</p> |
