Display apparatus, communication apparatus, displaying method and program recording medium

1. A display apparatus comprising:

a synchronizing unit which adjusts a timing, in which a video is displayed based on a predetermined reference frame received and decoded at first after channel selection, toward shifting earlier than a time originally displaying the video based on a time information attached to the reference frame.

2. The display apparatus according to claim 1 , wherein the synchronizing unit shifts a timing, in which the video based on a video frame following to the reference frame in a predetermined period is displayed, earlier than a normal displaying time based on the time information attached to the video frame, and shortens a time difference between the timing in which the video frame is displayed actually and the normal displaying time as time passes.

3. The display apparatus according to claim 2 , wherein the predetermined period is a time period between the timing when the video based on the reference frame starts to display and a timing when a predetermined time passed since starting to display the video.

4. The display apparatus according to claim 1 , wherein the synchronization unit matches a timing when a sound based on a sound frame corresponding to the reference frame is output to the timing when the video based on the reference frame is displayed.

5. The display apparatus according to claim 4 , wherein the synchronization unit shifts a timing, in which a sound is output based on the sound frame following to the sound frame corresponding to the reference frame in a predetermined period, earlier than a normal outputting time based on a time information attached to the sound frame, and shortens a time difference between the timing in which the sound frame is output actually and the normal outputting time as time passes.

6. The display apparatus according to claim 1 , wherein the synchronization unit shifts a timing, in which a subtitle data received at first after receiving a management data managing a subtitle first after channel selection is display, earlier than a normal time when the subtitle data is displayed based on the management data.

7. The display apparatus according to claim 6 , wherein the synchronization unit shifts a timing, in which the subtitle data received in a predetermined period following to the subtitle data displayed at first after channel selection is display, earlier than a normal displaying time based on the management data, and shortens a time difference between a time in which the subtitle data is displayed actually and the normal displaying time as time passes.

8. The display apparatus according to claim 1 , further comprising:

a decoding unit which decodes a received signal corresponding to the video frame which meets a predetermined reference frame condition as reference frame and decodes a received signal corresponding to a non-reference frame which is a video frame not meet the reference frame condition and received following to the reference frame based on the reference frames; wherein

the decoding unit decodes the non-reference frame referring a predetermined dummy reference frame in a case of receiving the non-reference frame prior to the reference frame after channel selection,

the synchronization unit shifts a timing, in which a video based on the decoded non-reference frame is displayed, earlier than a normal time when the video based on the non-reference frame is displayed based on a time information attached to the non-reference frame.

9. A communication apparatus comprising:

the display apparatus according to claim 1 .

10. A display apparatus comprising:

synchronizing means for adjusting a timing, in which a video is displayed based on a predetermined reference frame received and decoded at first after channel selection, toward shifting earlier than a time originally displaying the video based on a time information attached to the reference frame.