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Video/audio data supplying device
| Details |
Inventors: Taniguchi, Toshinori; Suzuki, Takamitsu;
Assignee: Brother Kogyo Kabushiki Kaisha (JP); Xing, Inc. (JP)
Primary Examiner: Cheng; Joe H.
Assistant Examiner:
Attorney, Agent or Firm: Oliff & Berridge, PLC
When the input output controller 22 receives request data through the modem 42, the input output controller 22 controls the memory controller 25 to retrieve an AV stream and a BGV stream from the memories and to transfer the streams to the multiplexer 30. The memory controller 25 retrieves a BGV stream from the BGV memories 26a, 26b, and 26c and an AV stream from the AV memories 27a, 27b, and 27c. When receiving the BGV stream and the AV stream, the multiplexer 30 divides the AV stream into a lyric stream and a music stream. The multiplexer 30 composes the lyric stream and the BGV stream into a video stream. The multiplexer 30 time-divisionally multiplexes the video stream and the music stream and outputs the multiplexed stream as a video/music stream. |
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DETAILED DESCRIPTION It is conceivable to encode and store karaoke software data as system stream data in the above-described video/audio data supplying device.
In order to achieve a karaoke performance, a karaoke lyric image is superimposed on a background image (moving picture).
A karaoke music sound (accompaniment music sound) is played in synchronization with the karaoke lyric image.
It is now assumed that the video/audio data supplying device has to supply 10,000 songs' worth of karaoke data.
In order to satisfy this demand, 10,000 songs' worth of lyric video data, 10,000 songs' worth of music data, and 10,000 songs' worth of background video data have to be encoded together into 10,000 songs' of video/audio data.
Thus produced 10,000 songs' worth of system stream data are stored in the memory device.
If each song is three minutes long, the total length of the video/audio data becomes as long as 30,000 minutes.
The total amount of the MPEG-encoded video data becomes as much as several tens giga-bytes.
It takes a long time to encode all the data.
The memory device has to have a large storage area.
The video/audio data supplying device becomes highly expensive.
The above-described problem is not limited to the case where karaoke software data is stored, but common to all the cases where video/audio data and another video data are composed into a system stream data and stored as a system stream data in a video/audio data supplying device.
It is therefore, an object of the present invention to overcome the above-described drawbacks, and to provide an improved video/audio data supplying device which can store a small amount of video data but which can supply a large variety of video data and which is still inexpensive.
In order to attain the above object and other objects, the present invention provides a video/audio data supplying device for supplying video data and audio data, the device comprising: data memory means for storing video/audio data, comprised of video data and audio data, and additional video data separately from the video/audio data; data retrieving means for retrieving the video/audio data and the additional video data from the data memory means; data composing means for composing the retrieved video/audio data and the additional video data into a single composite video/audio data; and output means for outputting the composite video/audio data
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