Image output device and image synthesizing method
A technology of video output and synthesis method, which is applied to color TV parts, TV system parts, input/output process of data processing, etc., and can solve problems such as inability to produce video signals and insufficient processing capacity of video processing devices, etc. To achieve the effect of inhibiting tearing
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Embodiment approach 1
[0046] figure 2It is a block diagram showing a schematic configuration of the video output device 1 of this embodiment. As shown in the figure, the video output device 1 has a signal synthesis unit 10 for synthesizing input video signals as a main component, and in addition to the above-mentioned signal synthesis unit 10, it also has a video input terminal, a video output terminal, a power supply unit, etc. not shown in the figure. . In addition, the above-mentioned signal synthesis unit 10 includes a first write address generation circuit 101 and a second write address generation circuit 102, a write frame number generation unit 110, a first frame memory 121 and a second frame memory 122, and an output timing signal generation circuit. The circuit 130, the read address generation circuit 140, the read frame number generation unit 150, the composite video signal output circuit 160, and the like.
[0047] Here, the first write address generation circuit 101, the second write...
Embodiment approach 2
[0107] Figure 5 It is a block diagram showing a schematic configuration of a video output device 1 ′ according to another embodiment of the present invention. Such as Figure 5 As shown, the video output device 1' in this embodiment is in figure 2 In more detail, the video output device 1 in the first embodiment described above has a configuration in which the writing unit of the signal synthesis unit 10 further includes the mediation circuit 170 as a writing control unit.
[0108] That is, the video output device in this embodiment includes: a first write address generation circuit 101, a second write address generation circuit 102, a write frame number generation unit 110, an arbitration circuit 170, a frame memory 120, an output timing The signal generation circuit 130, the read address generation circuit 140, the read frame number generation unit 150, the composite video signal output circuit 160, and the like. Here, the parts other than the mediation circuit 170 are ...
Embodiment approach 3
[0115] The following is based on Figure 6-8 The configuration and operation of a video output device according to another embodiment of the present invention will be described.
[0116] Here, in the above-mentioned Embodiments 1 and 2, the case where each input video signal divided into one video is written into the frame memory by the write frame number generating unit is described. The corresponding frame is assigned the same write frame number. And, when reading from the frame memory (read), input video signals with the same written frame number are read out and synthesized to output one video.
[0117] On the other hand, in the video output device of this embodiment, it is not at the stage of writing the input video signal into the frame memory, but at the stage of reading each input video signal written into the frame memory from the frame memory. Each input video signal is corresponded and synthesized, and output as 1 video. In the following, a case where the video s...
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