Multi-format output device, control method for multi-format output device

Abstract

A multi-format output device includes decoders to decode first encoded data and second encoded data to generate a first video data having a first-type format with first caption data also having the first-type format, and second video data having a second-type format with second caption data also having the second-type format. A conversion unit converts video data of one format type into video data having another format-type. A buffer holds the first video data by the period of time needed for the video data conversion processing. A caption conversion unit delays the caption data for the video data conversion processing time and also converts the caption data of one format type to another format type. A multiplexer outputs the first video data with the first caption data followed by the converted video data with the third caption data having the first-type format.

What is claimed is: 
     
         1 . A multi-format output device, comprising:
 a receiving circuit configured to receive a first encoded data and a second encoded data in a video format different from the first encoded data and separate and output the first encoded data and the second encoded data;   a first decoder configured to decode the first encoded data supplied from the receiving circuit to generate a first video data and a first caption data;   a second decoder configured to decode the second encoded data supplied from the receiving circuit to generate a second video data and a second caption data;   a conversion unit configured to convert the first video data generated by the first decoder into a third video data conforming to a same definition as the second video data;   a buffer configured to hold the second video data generated by the second decoder and delay the second video data by at least a period of time needed for conversion processing in the conversion unit;   a caption conversion unit configured to delay the second caption data by the period of time to output the second caption data, convert the first caption data into a third caption data conforming to the same definition as the second video data, and delay the third caption data by the period of time to output the third caption data;   a multiplexing unit configured to multiplex the third video data with the delayed third caption data and multiplex the delayed second video data with the delayed second caption data; and   an output unit configured to output the third video data multiplexed with the third caption data and the second video data multiplexed with the second caption data successively.   
     
     
         2 . The multi-format output device of  claim 1 , wherein the first video data is a high-definition video data and the second video data is a standard definition video data. 
     
     
         3 . The multi-format output device of  claim 1 , wherein the first video data is a standard definition video data and the second video data is a high-definition video data. 
     
     
         4 . The multi-format output device of  claim 1 , wherein the first video data is a 1080i compliant high-definition video data and the second video data is a 720p compliant high-definition video data. 
     
     
         5 . The multi-format output device of  claim 1 , wherein the first video data is a 720p compliant high-definition video data and the second video data is a 1080i compliant high-definition video data. 
     
     
         6 . A multi-format output device, comprising:
 a receiving circuit configured to receive a first encoded data and a second encoded data in a video format different from the first encoded data and separate and output the first encoded data and the second encoded data;   a buffer configured to hold the second encoded data supplied from the receiving circuit and delay the second encoded data by at least a first period of time;   a first decoder configured to decode the first encoded data supplied from the receiving circuit to generate a first video data and a first caption data;   a second decoder configured to decode the second encoded data output from the buffer to generate a second video data and a second caption data;   a conversion unit configured to convert the first video data generated by the first decoder into a third video data conforming to a same definition as the second video data for the first period of time;   a caption conversion unit configured to delay the second caption data by the first period of time to output the second caption data, convert the first caption data into a third caption data conforming to the same definition as the second video data, and delay the third caption data by the first period of time to output the third caption data;   a multiplexing unit configured to multiplex the third video data with the delayed third caption data and multiplex the delayed second video data with the delayed second caption data; and   an output unit configured to output the third video data multiplexed with the third caption data and the second video data multiplexed with the second caption data successively.   
     
     
         7 . The multi-format output device of  claim 6 , wherein the first video data is a high-definition video data and the second video data is a standard definition video data. 
     
     
         8 . The multi-format output device of  claim 6 , wherein the first video data is a standard definition video data and the second video data is a high-definition video data. 
     
     
         9 . The multi-format output device of  claim 6 , wherein the first video data is a 1080i compliant high-definition video data and the second video data is a 720p compliant high-definition video data. 
     
     
         10 . The multi-format output device of  claim 6 , wherein the first video data is a 720p compliant high-definition video data and the second video data is a 1080i compliant high-definition video data. 
     
     
         11 . A control method for a multi-format output device, comprising:
 receiving a first encoded data and a second encoded data in a video format different from the first encoded data;   separating the first encoded data and the second encoded data;   decoding the separated first encoded data to generate a first video data and a first caption data;   decoding the separated second encoded data to generate a second video data and a second caption data;   converting the generated first video data into a third video data conforming to a same definition as the second video data;   holding the generated second video data and delaying the second video data by at least a period of time needed for conversion processing;   delaying the second caption data by the period of time to output the second caption data;   converting the first caption data into a third caption data conforming to the same definition as the second video data and delaying the third caption data by the period of time to output the data;   multiplexing the third video data with the delayed third caption data;   multiplexing the delayed second video data with the delayed second caption data; and   outputting the third video data multiplexed with the third caption data and the second video data multiplexed with the second caption data successively.