A receiving apparatus comprising: a first receiver configured to receive, through a first network, first multimedia data comprising a first time stamp information, wherein the first network is a broadcasting network; a second receiver configured to receive, through a second network, second multimedia data comprising a second time stamp information; a first signal processor configured to obtain a first video frame from the first multimedia data; a second signal processor configured to obtain a second video frame from the second multimedia data; and a controller configured to compare the first multimedia data and the second multimedia data; characterized in that the first time stamp information includes a first Decoding Time Stamp, DTS, and a first Presentation Time Stamp, PTS; the second network is an IP network; the second time stamp information includes a second DTS and a second PTS; a first time code is added in every frame of the first multimedia data; a second time code is added in every frame of the second multimedia data; the controller is configured to compare the first time code of the first multimedia data and the second time code of the second multimedia data, calculate a difference between the first and second time stamp information of video frames comprising matching first and second time codes and synchronize the first video frame and the second video frame comprising matching time codes by correcting the time stamp information; and the receiving apparatus comprises a renderer configured to render the first video frame and the second video frame in response to the PTS of the first video frame and the second video frame being consistent with a system clock and display the first video frame and the second video frame on a display screen. a first receiver configured to receive, through a first network, first multimedia data comprising a first time stamp information, wherein the first network is a broadcasting network; a second receiver configured to receive, through a second network, second multimedia data comprising a second time stamp information; a first signal processor configured to obtain a first video frame from the first multimedia data; a second signal processor configured to obtain a second video frame from the second multimedia data; and a controller configured to compare the first multimedia data and the second multimedia data; characterized in that the first time stamp information includes a first Decoding Time Stamp, DTS, and a first Presentation Time Stamp, PTS; the second network is an IP network; the second time stamp information includes a second DTS and a second PTS; a first time code is added in every frame of the first multimedia data; a second time code is added in every frame of the second multimedia data; the controller is configured to compare the first time code of the first multimedia data and the second time code of the second multimedia data, calculate a difference between the first and second time stamp information of video frames comprising matching first and second time codes and synchronize the first video frame and the second video frame comprising matching time codes by correcting the time stamp information; and the receiving apparatus comprises a renderer configured to render the first video frame and the second video frame in response to the PTS of the first video frame and the second video frame being consistent with a system clock and display the first video frame and the second video frame on a display screen.