Abstract: A second video encoded buffer stores encoded data of a second channel at time of a single display. A buffer control unit specifies, at time of a switching from the single display to a simultaneous display, a key frame which is a start frame for decoding in the encoded data of the second channel and has a time stamp, which is earlier than a broadcasting time of the encoded data and also is closest to the broadcasting time. Moreover, the buffer control unit generates decoded data by decoding the encoded data of the second channel stored in the second encoded buffer from the specified key frame. A second video decoding unit and a second video output unit start a reproduction of the decoded data when the time stamp is synchronized with the broadcasting time.

Abstract: An audio PTS judgment unit 110 performs gap judgment whether a gap has occurred between a PTS currently acquired by an audio PTS acquisition unit 108 (a current PTS) and a PTS stored in an audio PTS storage unit 109 (a previous PTS). If the audio PTS judgment unit 110 judges affirmatively, a synchronization control unit 111 instructs an audio decoding unit 103 to decode, as fail-safe data, an audio frame having the current PTS in which the gap has occurred.

Abstract: The digital television broadcast recording and reproduction apparatus includes: a control unit which manages selection of either normal reproduction or digest reproduction; a decoding unit which, in the normal reproduction, generates decoded data of all pictures and their Presentation Time Stamps (PTSs), and in the digest reproduction, generates decoded data of some of the pictures and their PTSs; a catch-up detecting unit which calculates, in the digest reproduction, a difference value between one of the PTSs and a broadcast time, calculates a catch-up time at which the digest reproduction catches up with the current broadcast, sends, in the case of judging that a PTS of a next picture will overtake the current broadcast, a signal to the decoding unit indicating the judgment, and sends a catch-up signal to the control unit when the catch-up time matches the broadcast time. The control unit starts the normal reproduction upon reception of the catch-up signal.

Abstract: In a three-dimensional exploring method for finding location of a buried object by transmitting a wave signal (4) by means of e.g.