CN103841391A - Stereoscopic image format converter and stereoscopic image format conversion method thereof - Google Patents

Abstract

The present invention discloses a stereoscopic image format converter and a stereoscopic image format conversion method thereof. The stereoscopic image format converter comprises an input circuit, a processing circuit and an output circuit. The input circuit receives a frame encapsulation signal, which comprises an image signal, a first vertical synchronization signal and a first data enable signal. The processing circuit determines an active interval of the image signal according to the frame encapsulation signal, processes the first vertical synchronization signal to generate a second vertical synchronization signal, and processes the first data enable signal to generate a second data enable signal. The processing circuit generates a frame continuous signal, which comprises an image signal, a second vertical synchronization signal and a second data enable signal. The output circuit outputs the frame continuous signal.

Description

Stereoscopic image format converter and stereoscopic image format conversion method

technical field

The invention relates to a three-dimensional image format converter and a three-dimensional image format conversion method thereof. Specifically, the stereoscopic image format converter of the present invention can convert frame-packed signals into frame-continuous signals.

Background technique

In recent years, as the development of multimedia products has become increasingly mature, people's demand for multimedia special effects has become more and more dependent. Therefore, products related to three-dimensional (three-dimension; 3D) images have also attracted attention.

The specification standard of High Definition Multimedia Interface (HDMI) version 1.4 defines a 3D image format, that is, frame packing (frame packing) format. In order to achieve the resolution of 1080p video playback, the frame packing signal conforming to the frame packing format is to transmit the left eye image signal and the right eye image signal at the same time, wherein there is an interval signal between the left eye image signal and the right eye image signal . However, since the 3D image display devices on the market generally only support one 3D image format, the 3D image display devices that only support the frame sequential format cannot receive and process frame packing signals. In this case, consumers must re-purchase 3D image display devices that support the frame packing format in order to receive and process frame packing signals

In view of this, how to convert frame-packed signals into frame-sequential signals and provide the converted frame-sequential signals to 3D image display devices that only support frame-sequential formats is an urgent goal in the industry.

Contents of the invention

The object of the present invention is to provide a stereoscopic image format converter and a stereoscopic image format converting method thereof. The stereoscopic image format converter of the present invention processes the vertical synchronization signal and the data enabling signal of the frame packing signal according to the active interval of the frame packing signal, and generates the vertical synchronizing signal and the data enabling signal of the frame continuous signal. In this way, when the stereoscopic image format converter of the present invention is installed at the input end of a 3D image display device that only supports the frame-sequential format, the frame-packed signal can be converted into a frame-sequential signal, and provided to the 3D image display device , so that it can play frame continuous signals, thereby solving the problem that consumers have to re-purchase stereoscopic image display devices.

To achieve the above purpose, the present invention discloses a stereoscopic image format converter. The stereoscopic image format converter includes an input circuit, a processing circuit and an output circuit. The input circuit is used for receiving a frame packing signal. The frame packing signal includes an image signal, a first vertical synchronization signal and a first data enabling signal. The processing circuit is coupled to the input circuit, and is used for determining an active interval of the image signal according to the frame packing signal, and processing the first vertical synchronization signal to generate a second vertical synchronization signal and processing according to the active interval. The first data enabling signal is used to generate a second data enabling signal. The processing circuit generates a continuous signal of one frame. The frame continuous signal includes an image signal, a second vertical synchronization signal and a second data enabling signal. The output circuit is coupled to the processing circuit for outputting the frame continuous signal.

In addition, the invention further discloses a stereoscopic image format conversion method for a stereoscopic image format converter. The stereoscopic image format converter includes an input circuit, a processing circuit and an output circuit. The processing circuit is coupled to the input circuit. The output circuit is coupled to the processing circuit. The stereoscopic image format conversion method includes the following steps: making the input circuit receive a frame packing signal, the frame packing signal including an image signal, a first vertical synchronous signal and a first data enabling signal; making the processing circuit receive the frame packing signal according to the frame packing signal , determine an active interval of the image signal, and process the first vertical synchronization signal to generate a second vertical synchronization signal and process the first data enable signal to generate a second data enable signal according to the active interval ; make the processor generate a frame continuous signal, the frame continuous signal includes the image signal, the second vertical synchronization signal and the second data enabling signal; and make the output circuit output the frame continuous signal.

After referring to the drawings and the implementations described later, those skilled in the art can understand other objectives of the present invention, as well as the technical means and implementations of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of a stereoscopic image format converter 1 according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of a frame packaging signal 102;

FIG. 3 is a schematic diagram of a frame of continuous signal 104;

FIG. 4 is a schematic diagram of the processing circuit of the stereoscopic image format converter 2 according to the second embodiment of the present invention;

FIG. 5 is a flowchart of a stereoscopic image format conversion method according to a third embodiment of the present invention; and

FIG. 6 is a flowchart of a stereoscopic image format conversion method according to a fourth embodiment of the present invention.

Wherein, the reference signs are explained as follows:

1 Stereo image format converter;

11 input circuit;

13 processing circuit;

15 output circuit;

102 frame packing signal;

102_i image signal;

102_vsync The first vertical synchronization signal;

102_hsync horizontal synchronization signal;

102_en First data enabling signal;

R right eye image signal;

L Left eye image signal;

S interval signal

104 frame continuous signal

104_vsync Second vertical synchronization signal

104_en Second data enabling signal

2 Stereo image format converter;

131 judgment circuit;

133 active interval shielding circuit;

135 vertical synchronization insertion circuit;

137 integrated circuits.

Detailed ways

The content of the present invention will be explained below through examples. However, the embodiments of the present invention are not intended to limit the present invention to be implemented in any environment, application or manner as described in the embodiments. Therefore, the descriptions about the embodiments are only for the purpose of illustrating the present invention, rather than directly limiting the present invention. It should be noted that in the following embodiments and illustrations, elements not directly related to the present invention have been omitted and not shown.

FIG. 1 is a schematic diagram of a stereoscopic image format converter 1 according to a first embodiment of the present invention. The stereoscopic image format converter 1 includes an input circuit 11 , a processing circuit 13 and an output circuit 15 . The processing circuit 13 is coupled to the input circuit 11 and the output circuit 15 . The stereoscopic image format converter 1 can be installed at the input end of a 3D image display device (for example: LCD screen, LCD TV, projector, etc.) that only supports frame-sequential format, so as to convert a frame-encapsulated signal into a frame-continuous signal.

The input circuit 11 may include an input interface (for example, an HDMI interface) for receiving a frame-packed signal 102 from an external multimedia player (not shown). As shown in FIG. 2 , the frame packing signal 102 includes an image signal 102_i, a first vertical synchronization signal 102_vsync, a horizontal synchronization signal 102_hsync and a first data enable signal 102_en. The image signal 102_i includes a right-eye image signal R, an interval signal S, and a left-eye image signal L. The space signal S corresponds to an active space for separating the right-eye image signal R and the left-eye image signal L. The multimedia player can be a Blu-ray player, a personal computer or any device capable of generating frame-packed signals.

The processing circuit 13 determines the active interval of the video signal 102_i according to the frame packing signal 102 . Next, the processing circuit 13 processes the first vertical synchronization signal 102_vsync to generate a second vertical synchronization signal 104_vsync and processes the first data enable signal 102_en to generate a second data enable signal 104_en according to the active interval. Subsequently, the processing circuit 13 generates a frame-continuous signal 104 including an image signal 102_i, a second vertical synchronization signal 104_vsync, a horizontal synchronization signal 102_hsync, and a second data enable signal 104_en, as shown in FIG. 3 . The output circuit 15 may include an output interface (for example: HDMI interface), and is used to output the frame continuous signal 104 to the connected 3D image display device.

Specifically, since the frame packing signal 102 has the information of the interval signal between the image signals 102_i, and the interval signal corresponds to the active interval of the image signal 102_i, the processing circuit 13 can, after receiving the frame packing signal 102 from the input circuit 11 , according to this information to determine the active interval of the video signal 102_i. Subsequently, the processing circuit 13 eliminates the data-enabling waveform corresponding to the active interval in the first data-enabling signal 102_en (that is, turns all high-level voltages into low-level voltages) to form a second data-enabling signal 104_en. Next, the processing circuit 13 adds a vertical synchronization waveform to the part of the first vertical synchronization signal 102_vsync corresponding to the active interval (that is, converting the low-level voltage to a high-level voltage with a specific width) to generate the second vertical synchronization signal. 104_vsync.

The second embodiment of the present invention is shown in FIG. 4 , which is a schematic diagram of a stereoscopic image format converter 2 . Different from the first embodiment, in this embodiment, the processing circuit 13 includes a judging circuit 131 , an active gap masking circuit 133 , a vertical sync insertion circuit 135 and an integration circuit 137 . The judging circuit 131 and the integrating circuit 137 are coupled to the active gap masking circuit 133 and the vertical sync insertion circuit 135 . After the processor 13 receives the frame packing signal 102 from the input circuit 11, the judging circuit 131 determines the active interval of the image signal 102_i according to the frame packing signal 102, and the active interval masking circuit 133 processes the first data enable signal of the frame packing signal 102 102_en, and the vertical sync insertion circuit 135 processes the first vertical sync signal 102_vsync of the frame packing signal 102 .

Specifically, the active interval masking circuit 133 is used to eliminate the data enable waveform of the first data enable signal 102_en in the active interval to generate the second data enable signal 104_en, and the vertical sync insertion circuit 135 is used for the active interval. In the interval, the vertical sync waveform is inserted into the first vertical sync signal 102_vsync to generate the second vertical sync signal 104_vsync. Finally, the integration circuit 137 integrates the image signal 102_i , the second vertical synchronization signal 104_vsync , the horizontal synchronization signal 102_hsync and the second data enable signal 104_en to generate the frame continuous signal 104 .

FIG. 5 is a flowchart of a stereoscopic image format conversion method according to a third embodiment of the present invention. The stereoscopic image format conversion method of this embodiment can be used in a stereoscopic image format converter (for example: the stereoscopic image format converter 1 of the first embodiment), which includes an input circuit, a processing circuit and an output circuit, and the processing circuit coupled to the input circuit and the output circuit.

First, step S501 is executed to enable the input circuit to receive a frame packing signal, which includes an image signal, a first vertical synchronization signal and a first data enable signal. Next, step S503 is executed to make the processing circuit determine an active interval of the image signal according to the image packaging signal, and process the first vertical synchronous signal to generate a second vertical synchronous signal according to the active interval, and process the first data enabling signal , to generate a second data enable signal. Step S505 is executed to enable the processing circuit to generate a continuous frame signal, which includes an image signal, a second vertical synchronization signal and a second data enable signal. Finally, step S505 is executed to make the output circuit output the frame continuous signal.

FIG. 6 is a flowchart of a stereoscopic image format conversion method according to a fourth embodiment of the present invention. The stereoscopic image format conversion method of this embodiment can be used for a stereoscopic image format converter (for example: the stereoscopic image format converter 2 of the second embodiment), which includes an input circuit, a processing circuit and an output circuit, and the processing circuit coupled to the input circuit and the output circuit. In this embodiment, the processing circuit includes a judging circuit, an active interval masking circuit, a vertical sync insertion circuit and an integration circuit, and the judgment circuit and the integration circuit are coupled to the active interval masking circuit and the vertical sync insertion circuit.

First, step S601 is executed to enable the input circuit to receive a frame packing signal, which includes an image signal, a first vertical synchronization signal and a first data enable signal. Next, step S603 is executed to make the judging circuit determine the active interval of the video signal according to the frame packing signal. Then, step S605 is executed to enable the active interval masking circuit to eliminate a data enable waveform of the first data enable signal in the active interval to generate a second data enable signal. Step S607 is executed to enable the vertical sync insertion circuit to insert a vertical sync waveform into the first vertical sync signal in the active interval to generate a second vertical sync signal. Subsequently, step S609 is executed to enable the integrated circuit to generate a continuous frame signal, which includes the image signal, the second vertical synchronous signal and the second data enabling signal. Finally, step S611 is executed to make the output circuit output the frame continuous signal.

In summary, the 3D image format converter and the 3D image format conversion method of the present invention can easily and effectively convert frame-packed signals into frame-continuous signals. Therefore, when the stereoscopic image format converter of the present invention is installed at the input end of a 3D image display device that only supports the frame-sequential format, the frame-packed signal can be converted into a frame-sequential signal, and provided to the 3D image display device, so that It can play frame continuous signals, thereby solving the problem that consumers have to re-purchase stereoscopic image display devices.

However, the above-mentioned embodiments are only for illustrating the implementation of the present invention and explaining the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any changes or equivalence arrangements that can be easily accomplished by those skilled in the art fall within the scope of the present invention, and the scope of protection of the present invention should be determined by the scope of the claims of the patent application.

Claims (10)

1. A stereoscopic image format converter, comprising: An input circuit for receiving a frame packing signal, the frame packing signal including an image signal, a first vertical synchronization signal and a first data enabling signal; a processing circuit, coupled to the input circuit, for determining an active interval of the image signal according to the frame packing signal, and processing the first vertical synchronization signal according to the active interval to generate a second vertical synchronization signal, and Process the first data enable signal according to the active interval to generate a second data enable signal, and generate a frame continuous signal, the frame continuous signal includes the image signal, the second vertical synchronization signal and the second data an enabling signal; and An output circuit, coupled to the processing circuit, is used to output the frame continuous signal. 2. The stereoscopic image format converter as claimed in claim 1, wherein the processing circuit further comprises: a judging circuit, used to determine the active interval of the image signal according to the frame packing signal; an active interval masking circuit, coupled to the judging circuit, for eliminating a data enable waveform of the first data enable signal in the active interval to generate the second data enable signal; a vertical sync insertion circuit, coupled to the judging circuit, for inserting a vertical sync waveform into the first vertical sync signal in the active interval to generate the second vertical sync signal; and An integrated circuit, coupled to the active interval masking circuit and the vertical sync insertion circuit, is used to generate the frame continuous signal. 3. The stereoscopic image format converter as claimed in claim 1, wherein the image signal comprises a right-eye image signal, an interval signal and a left-eye image signal, and the interval signal corresponds to the active interval. 4. The stereoscopic video format converter as claimed in claim 1, wherein the frame packing signal and the frame continuous signal further comprise a horizontal synchronization signal. 5. The stereoscopic image format converter as claimed in claim 1, wherein the input circuit comprises an input interface, and the output circuit comprises an output interface. 6. The stereoscopic image format converter as claimed in claim 5, wherein the input interface and the output interface are a high-definition multimedia interface. 7. A stereoscopic image format conversion method for a stereoscopic image format converter, the stereoscopic image format converter includes an input circuit, a processing circuit and an output circuit, the processing circuit is coupled to the input circuit and the output Circuit, the stereoscopic image format conversion method includes the following steps: making the input circuit receive a frame packing signal, the frame packing signal including an image signal, a first vertical synchronization signal and a first data enabling signal; making the processing circuit determine an active interval of the image signal according to the frame packing signal, and process the first vertical synchronization signal to generate a second vertical synchronization signal and process the first data enable signal according to the active interval, to generate a second data enabling signal; causing the processing circuit to generate a frame continuous signal, the frame continuous signal including the image signal, the second vertical synchronization signal and the second data enable signal; and The output circuit is made to output the frame continuous signal. 8. The stereoscopic image format conversion method as claimed in claim 7, wherein the processing circuit further comprises a judging circuit, an active interval masking circuit, a vertical synchronization insertion circuit and an integrating circuit, the judging circuit and the integrating circuit are coupled To the active interval masking circuit and the vertical synchronization insertion circuit, the stereoscopic image format conversion method further includes the following steps: making the judging circuit determine the active interval of the image signal according to the frame packing signal; causing the active interval masking circuit to eliminate a data enable waveform of the first data enable signal within the active interval to generate the second data enable signal; causing the vertical sync insertion circuit to insert a vertical sync waveform into the first vertical sync signal in the active interval to generate the second vertical sync signal; The integrated circuit generates the frame continuous signal. 9. The stereoscopic image format conversion method as claimed in claim 7, wherein the image signal comprises a right-eye image signal, an interval signal and a left-eye image signal, and the interval signal corresponds to the active interval. 10. The stereoscopic video format conversion method as claimed in claim 7, wherein the frame packing signal and the frame continuous signal further comprise a horizontal synchronization signal.

Images