JP6791159B2 - Frame generator, frame generator, signal extractor, signal extractor, image transmission system and image transmission method - Google Patents

Description

The present disclosure relates to a frame generator, a frame generator, a signal extractor, a signal extractor, an image transmission system and an image transmission method.

In recent years, HDMI (High-Definition Multimedia Interface) and DisplayPort have been standardized and widely used as methods for digitally transmitting video signals.

In HDMI and displayport, the transmitter sequentially transmits one line of pixels from the upper left edge to the upper right edge of the screen of a display device such as a CRT (Cathode Ray Tube) and an LCD (liquid crystal display) to the receiver. Then, when the transmitter finishes transmitting the pixels of one line, the transmitter repeats the operation of sequentially transmitting the pixels of the next lower line to the receiver from the left end to the right end.

Then, when the transmitter finishes transmitting the pixels for one line at the lowermost end, the transmitter returns to the pixels at the upper left corner of the screen again and continues the pixel transmission to the receiver to transmit the video signal to the receiver. At this time, the video signal transmitted from the transmitter includes a horizontal blanking section (hereinafter, also referred to as “H. blanking section”) and a vertical blanking section between the Active video area and the next Active video area. A ranking section (hereinafter, also referred to as “V. blanking section”) is included (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-90113

However, H. Blanking section and V.I. It is desired to provide a technique capable of more reliably transmitting an active video region of a video signal having a blanking section as a format from a transmitter to a receiver via the transmission path.

According to the present disclosure, a horizontal blanking section reduction unit that reduces the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section to obtain a horizontal blanking section reduction signal, and the horizontal section reduction unit. Provided is a frame generator including a reduction signal frame generation unit that generates a frame including a blanking section reduction signal as a reduction signal frame.

According to the present disclosure, the horizontal blanking section is reduced to obtain a horizontal blanking section reduction signal from a video signal in a format having a horizontal blanking section and a vertical blanking section, and the horizontal blanking section reduction signal is obtained. A frame generation method including the generation of a frame containing the above as a reduced signal frame is provided.

According to the present disclosure, a reduction signal extraction unit that extracts a horizontal blanking section reduction signal from a reduction signal frame including a horizontal blanking section reduction signal in which a horizontal blanking section is reduced from a video signal, and the horizontal blanking section reduction Provided is a signal extraction device including a horizontal blanking section restoration unit that obtains the video signal by performing a process of restoring the horizontal blanking section on the signal.

According to the present disclosure, the horizontal blanking section reduction signal is extracted from the reduction signal frame including the horizontal blanking section reduction signal in which the horizontal blanking section is reduced from the video signal, and the horizontal blanking section reduction signal is described. A signal extraction method is provided, which includes obtaining the video signal by performing a process of restoring the horizontal blanking section.

According to the present disclosure, a horizontal blanking section reduction unit that reduces the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section to obtain a horizontal blanking section reduction signal, and the horizontal blanking section reduction unit. A transmitter including a reduction signal frame generation unit that generates a frame including a blanking section reduction signal as a reduction signal frame and a transmission unit that transmits the reduction signal frame, and a reception unit that receives the reduction signal frame. A reduction signal extraction unit that extracts a horizontal blanking section reduction signal from the reduction signal frame, and a horizontal processing that restores the horizontal blanking section with respect to the horizontal blanking section reduction signal to obtain the video signal. An image transmission system comprising a blanking section restoration unit and a receiver is provided.

According to the present disclosure, the horizontal blanking section is reduced to obtain a horizontal blanking section reduction signal from a video signal in a format having a horizontal blanking section and a vertical blanking section, and the horizontal blanking section reduction signal is obtained. To generate a frame containing the reduced signal frame as a reduced signal frame, to transmit the reduced signal frame to the receiver, to receive the reduced signal frame from the transmitter, and to reduce the horizontal blanking section from the reduced signal frame. An image transmission method is provided, which includes extracting a signal and obtaining the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal.

As described above, according to the present disclosure, H. Blanking section and V.I. Provided is a technique capable of more reliably transmitting an active video region of a video signal having a blanking section as a format from a transmitter to a receiver via the transmission path. It should be noted that the above effects are not necessarily limited, and together with or in place of the above effects, any of the effects shown herein, or any other effect that can be grasped from this specification. May be played.

It is a figure which shows the format of the video signal which concerns on one Embodiment of this disclosure. It is a figure which shows the format of the horizontal blanking section reduction signal. It is a figure which shows the example of the format of the video signal to which a specific numerical value is applied. It is a figure which shows the example of the format of the horizontal blanking section reduction signal to which a specific numerical value is applied. It is a figure which shows the configuration example of an image transmission system. It is a figure which shows the structural example of a frame. It is a figure for demonstrating the pixel transmission order of the horizontal blanking section reduction signal. It is a figure which shows the composition example of a plurality of frames generated continuously.

Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

Further, in the present specification and the drawings, a plurality of components having substantially the same functional configuration are distinguished by adding different numbers after the same reference numerals. However, if it is not necessary to distinguish each of a plurality of components having substantially the same functional configuration, only the same reference numerals are given. In addition, similar components of different embodiments are distinguished by adding different alphabets after the same reference numerals.

The explanations will be given in the following order.
1. 1. Description of the present embodiment 1.1. Background 1.2. Video signal format 1.3. Determining the deletion area 1.4. Configuration example of image transmission system 2. Conclusion

<1. Description of this embodiment>
[1.1. background]
First, the background of this embodiment will be described. In recent years, HDMI and displayport have been standardized and widely used as methods for digitally transmitting video signals. In HDMI and displayport, the transmitter sequentially transmits one line of pixels to the receiver from the upper left edge to the upper right edge of the screen of a display device such as a CRT or LCD. Then, when the transmitter finishes transmitting the pixels of one line, the transmitter repeats the operation of sequentially transmitting the pixels of the next lower line to the receiver from the left end to the right end.

Then, when the transmitter finishes transmitting the pixels for one line at the lowermost end, the transmitter returns to the pixels at the upper left corner of the screen again and continues the pixel transmission to the receiver to transmit the video signal to the receiver. At this time, in the video signal transmitted from the transmitter, between the Active video region and the next Active video region, H.I. Blanking section and V.I. A blanking section is included (see, for example, Japanese Patent Application Laid-Open No. 2013-90113).

Therefore, since the transmission band required as HDMI or displayport is the transmission band including these blanking sections, a higher transmission band is required as compared with the case of transmitting only the Active video region. For example, in the CEA (Consumer Electronics Association) format called full HD (High Definition), the number of effective pixels is 1920 × 1080, the pixel element is RGB, the number of bits of each RGB is 12 bits, and the frame rate is high. It is 120 Hz.

Further, in such a format, the transmission rate in the Active video region of the video signal (hereinafter, also referred to as “effective transmission rate”) is about 8.958 Gbps, and H.I. Blanking section and V.I. The transmission rate of the entire video signal including the blanking section (hereinafter, also referred to as “total transmission rate”) is 10.692 Gbps.

On the other hand, with the development of high-speed communication networks in recent years, an environment has been established in which an optical transmission module capable of operating at 10 GHz can be used at low cost. With such an optical transmission module, a transmission capacity of 10 Gbps can be realized in a transmission line using a general NRZ (Non Return to Zero) modulation method. However, even if an optical transmission module having a transmission capacity of 10 Gbps is used, a full HD format signal having a total transmission amount of 10.692 Gbps cannot be transmitted on one transmission line.

Therefore, in the present specification, H. Blanking section and V.I. We propose a technique capable of more reliably transmitting an active video region of a video signal having a blanking section as a format from a transmitter to a receiver via the transmission path. Specifically, in the present specification, from the video signal, H. We propose a method of suppressing the amount of data transmitted on the transmission line by a method of reducing the blanking section.

The background of this embodiment has been described above.

[1.2. Video signal format]
Subsequently, the format of the video signal according to the present embodiment will be described. FIG. 1 is a diagram showing a format of a video signal according to the present embodiment. As shown in FIG. 1, the video signal 60A is the active video region 62, H.I. Blanking section 64 and V.I. It has a blanking section 63, and the number of bits per pixel is M [bit].

Further, in FIG. 1, the number of pixels in the horizontal direction in the video signal 60A (hereinafter, also referred to as “total number of horizontal pixels”) is represented as TN [pixel]. Further, in FIG. 1, H. The number of pixels in the horizontal direction in the blanking section 64 is represented as HB [pixel]. Further, in FIG. 1, the number of pixels in the horizontal direction (hereinafter, also referred to as “horizontal effective pixel number”) in the Active video region 62 is represented as AN [pixel].

Here, the total number of horizontal pixels TN, H. The number of pixels HB in the horizontal direction and the number of effective pixels AN in the horizontal direction in the blanking section 64 are each an integer, and these integers satisfy the following (Formula 1).

TN = AN + HB ・ ・ ・ (Formula 1)

Further, in FIG. 1, the number of vertical lines in the video signal 60A (hereinafter, also referred to as “total number of vertical lines”) is represented as TL [line]. Further, in FIG. 1, V.I. The number of vertical lines in the blanking section is represented as VB [line]. Further, in FIG. 1, the number of vertical lines (hereinafter, also referred to as “vertical effective line number”) in the active video region 62 is represented as AL [line].

Here, the total number of vertical lines TL, V.I. The number of vertical lines VB and the number of vertically effective lines AL in the blinking section are each an integer, and these integers satisfy the following (Formula 2).

TL = AL + VB ... (Formula 2)

Here, if the frame rate of the video signal 60A is defined as Fr [Hz], the transmission rate of the entire video signal (hereinafter, also referred to as “total transmission rate”) VD (Video Data rate) is a bit per pixel. Since it is equal to the product of the number M, the total number of horizontal pixels TN, the total number of vertical lines TL, and the frame rate Fr, it is expressed as shown in the following (Equation 3).

VD = M x TN x TL x Fr ... (Formula 3)

Further, the transmission rate (effective transmission rate) AVD (Active video data rate) of the Active video region 62 in the video signal 60A is the number of bits M per pixel, the number of horizontally effective pixels AN, the number of vertically effective lines AL, and the frame rate Fr. Since it is equal to the product of, it is expressed as shown in (Formula 4) below.

AVD = M x AN x AL x Fr ... (Formula 4)

On the other hand, in the present embodiment, the transmission capacity TC of the given transmission line is assumed to be smaller than the total transmission rate VD and larger than the effective transmission rate AVD. Therefore, the following (Formula 5) The relationship shown in is established. However, the relationship shown in (Formula 5) does not necessarily have to be established. For example, even if the transmission capacity TC of the transmission line is the total transmission rate VD or more, the same effect as that of the present embodiment can be enjoyed. obtain.

VD> TC> AVD ... (Formula 5)

The format of the video signal 60A according to the present embodiment has been described above.

[1.3. Determining the deletion area]
Here, in the present embodiment, the transmitter uses the H.S. A horizontal blanking section reduction signal with the blinking section 64 reduced is generated, and a horizontal blanking section reduction signal whose transmission rate is suppressed to the transmission capacity TC or less of the transmission line is transmitted to the receiver. According to such a configuration, at least the active video region 62 in the video signal 60A is transmitted by the transmission line having the transmission capacity TC. For example, H. By deleting the predetermined deletion area of the blanking section 64, H.I. The blanking section 64 is reduced.

FIG. 2 is a diagram showing a format of a horizontal blanking section reduction signal. As shown in FIG. 2, the horizontal blanking section reduction signal 61A is the H.A. The deletion area 642 was deleted from the blanking section 64, and H.I. This is a signal in which the residual region 641 remains in the blanking section 64. At this time, the deletion area 642 can be determined by the procedure shown below. In the present embodiment, the number of vertical lines in the deleted area 642 is the same as the number of vertical lines in the video signal 60A, and the procedure for determining the number of horizontal pixels in the deleted area 642 will be described.

Further, in the present embodiment, an example in which the deletion area 642 is determined by the designer will be described, but the deletion area 642 may be determined by the transmitter, the receiver, or the transmission. It may be determined by a device different from the device and receiver (eg, server, etc.).

(Procedure 1)
The designer has a number of horizontal effective pixels AN and H. A divisor group (HDENO1, HDENO2, HDENO3, ...) Of the total number of horizontal pixels TN, which is the sum of the number of pixels in the horizontal direction HB in the blanking section 64, is obtained.

(Procedure 2)
The designer uses the obtained divisor group as the denominator, and rational numbers (HNUME1 / HDENO1, HNUME2 / HDENO2, HNUME3 / HDENO3) created by each denominator and an arbitrary numerator group (HNUME1, HNUME2, HNUME3, ...). , ...), find a rational number group that simultaneously satisfies the following three conditions (condition 1) to (condition 3).

"(Condition 1) Smaller than TC / VD."
"(Condition 2) Closest to TC / VD for each denominator."
"(Condition 3) The value obtained by multiplying the multiplication result of the number of bits M per pixel and the total number of horizontal pixels TN is a multiple of 8 (in bytes)."

Note that condition 1 is a condition necessary for at least the active video region 62 to be transmitted via the transmission line. Condition 2 is a condition necessary to make the deleted area 642 as large as possible. Further, the condition 3 is a condition necessary for handling the horizontal blanking section reduction signal 61A in byte units. Therefore, (Condition 1) is essential, but (Condition 2) and (Condition 3) may be applied as necessary.

(Procedure 3)
Subsequently, the designer obtains a rational number that satisfies the following (condition 4) from the rational number group obtained in (procedure 2).

"(Condition 4) The divisor of the value obtained by multiplying the multiplication result of the number of bits M per pixel and the total number of horizontal pixels TN is the largest."

More specifically, the designer uses the value obtained by multiplying the multiplication result of the number of bits M per pixel and the total number of horizontal pixels TN by the rational number group obtained in (Procedure 2) as a prime factor. Disassemble. Then, the designer finds a rational number (HNUME / HDENO) that has the largest divisor created by the prime factors. Since (Condition 4) is a condition necessary to increase the degree of freedom in selecting the packet size when the horizontal blanking section reduction signal 61A is divided into packets, (Condition 4) is applied as necessary. It should be done.

(Procedure 4)
Subsequently, the designer obtains the number of pixels in the horizontal direction of the horizontal blanking section reduction signal 61A by multiplying the total number of horizontal pixels TN by the rational number (HNUME / HDENO) obtained in (Procedure 3). Further, the designer obtains the number of horizontal pixels in the deletion area 642 by subtracting the number of horizontal pixels of the horizontal blanking section reduction signal 61A from the total number of horizontal pixels TN.

Subsequently, a case where a specific numerical value is applied to the present embodiment will be described as an example with reference to FIGS. 3 and 4. FIG. 3 is a diagram showing an example of a video signal format to which specific numerical values are applied. Further, FIG. 4 is a diagram showing an example of a format of a horizontal blanking section reduction signal to which a specific numerical value is applied. The video signal 60B shown in FIG. 3 is a CEA format video signal called full HD, has 36 bits per pixel, and has a frame rate of 120 Hz.

Further, as shown in FIG. 3, since the total number of horizontal pixels is 2200 pixels and the total number of vertical lines is 1125 lines, the total transmission rate is 36 × 2200 × 1125 × 120 = 10.692 [Gbps]. is there. Further, as shown in FIG. 3, since the number of horizontal effective pixels is 1920 pixels and the number of vertical effective lines is 1080 pixels, the effective transmission rate is 36 × 1920 × 1080 × 120 = 8.958 [Gbps]. is there. The designer uses these numerical values to determine the number of pixels in the horizontal direction of the deletion area 642 by the following procedure.

(Procedure 1)
The designer finds a divisor group of 2200, which is the total number of horizontal pixels. More specifically, the designer factors 2200, which is the total number of horizontal pixels, into prime factors as shown in the following (Formula 6).

2200 = 2 × 2 × 2 × 5 × 5 × 11 ・ ・ ・ (Formula 6)

Therefore, the designer can use the prime factors decomposed in this way to reduce the divisor group of 2200, which is the total number of horizontal pixels, to "1,2,4,5,8,10,11,20,22". , 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100 ".

(Procedure 2)
Subsequently, the designer finds that among the fractions whose denominators are these divisor groups, the transmission capacity of the transmission line is smaller than 10 [Gbps] / total transmission rate of 10.692 [Gbps], and the transmission capacity of the transmission line for each denominator It is the closest to 10 [Gbps] / total transmission rate of 10.692 [Gbps], and the value obtained by multiplying the number of bits per pixel by 36 [bit] and the total number of horizontal pixels of 2200 is a multiple of 8. Find a rational number group. The designer calls such a rational number group "10/11, 46/50, 102/110, 82/88, 514/550".

(Procedure 3)
Subsequently, the designer finds the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bytes per pixel and the total number of horizontal pixels from among these rational number groups. Specifically, the designer calculates the value obtained by multiplying the multiplication result of the number of bytes per pixel (= 36 bits / 8 bits) and the total number of horizontal pixels of 2200 by a rational number group as follows. Factorization is performed as shown in (Formula 7-1) to (Formula 7-5).

(10/11) x (36/8) x 2200 = (2 ^ 3) x (3 ^ 2) x (5 ^ 3)
... (Formula 7-1)
(46/50) x (36/8) x 2200 = (2 ^ 2) x 3 x 11 x 23
... (Formula 7-2)
(102/110) x (36/8) x 2200 = (2 ^ 2) x 3 x 5 x 51
... (Formula 7-3)
(82/84) x (36/8) x 2200 = (3 ^ 2) x (5 ^ 2) x 41
... (Formula 7-4)
(514/550) x (36/8) x 2200 = (2 ^ 2) x (3 ^ 2) x 257
... (Formula 7-5)

Therefore, the designer finds the rational number with the largest divisor as 10/11 from these rational number groups.

(Procedure 4)
Subsequently, the designer obtains the number of horizontal pixels of the horizontal blanking section reduction signal 61B as 2000 by multiplying the rational number 10/11 obtained in step 3 and the total number of horizontal pixels 2200. Further, the designer obtains the number of horizontal pixels of the deletion area 642 as 200 by subtracting 2000, which is the number of horizontal pixels of the horizontal blanking section reduction signal 61B, from 2200, which is the total number of horizontal pixels.

With reference to FIG. 4, the number of horizontal pixels in the deletion region 642 in the video signal 60B is shown as 200. Since the transmission rate in the transmission area is 36 [bit] × 10/11 × 2200 × 1125 × 120 = 9.72 [Gbps], it can be suppressed to 10 [Gbps] or less, which is the transmission capacity of the transmission line. Is grasped.

The procedure for determining the deletion area 642 in the video signal 60B has been described above.

[1.4. Image transmission system configuration example]
Subsequently, with reference to FIG. 5 (see FIGS. 1 and 2 as appropriate), the video signals 60A to H.I. A configuration example of an image transmission system for transmitting the horizontal blanking section reduction signal 61A in which the blanking section 64 is reduced will be described. FIG. 5 is a diagram showing a configuration example of an image transmission system according to the present embodiment. As shown in FIG. 5, the image transmission system 1 includes a transmitter 10, a receiver 20, a video signal generator 40, and a video signal display device 50. The transmitter 10 can function as a "frame generator". In addition, the receiver 20 can function as a "signal extraction device".

The video signal generator 40 generates a video signal 60A. In the present embodiment, it is assumed that a video signal 60A in CEA format called full HD is generated. However, the format of the video signal 60A is not limited to this, and H. Blanking section 64 and V.I. It suffices to have a blanking section 63. The transmission rate of the video signal 60A is expressed as VD [Mbps]. The video signal 60A generated by the video signal generator 40 is transmitted to the transmitter 10 via the cable 401.

The transmitter 10 and the receiver 20 are connected by a transmission line 301. The transmission capacity of the transmission line 301 is expressed as TC [Mbps]. For example, it is assumed that the relationship of total transmission rate VD of video signal 60A> transmission capacity TC of transmission line 301 is established. In such a case, the video signal 60A received by the transmitter 10 from the video signal generator 40 cannot be transmitted to the receiver 20 as it is.

The transmitter 10 includes a horizontal blanking section reduction unit 101, a reduction signal frame generation unit 102, a transmission unit 103, a deletion information frame generation unit 112, and a transmission unit 113. The horizontal blanking section reduction unit 101 has a video signal of 60A to H. The blanking section 64 is reduced to obtain the horizontal blanking section reduction signal 61A. More specifically, the horizontal blanking section reduction unit 101 has a video signal 60A to H. By deleting the deletion area 642 of the blanking section 64, H.I. The blanking section 64 is reduced.

H. When the blanking section 64 is reduced, the relationship of the transmission rate RVD of the horizontal blanking section reduction signal 61A ≤ the transmission capacity TC of the transmission line 301 is established. Subsequently, the reduction signal frame generation unit 102 generates a frame including the horizontal blanking section reduction signal 61A as a reduction signal frame. Here, a frame configuration example will be described.

FIG. 6 is a diagram showing a configuration example of the frame. As shown in FIG. 6, the frame includes information for identifying the frame delimiter (hereinafter, also simply referred to as “SYNC”) and an information field. FIG. 7 is a diagram for explaining the pixel transmission order of the horizontal blanking section reduction signal 61A. As shown in FIG. 7, the horizontal blanking section reduction signal 61A includes an Active video region 62 and a Blanking section 65. The Blanking section 65 includes V.I. This is a region in which the blanking section 63 and the residual region 641 are combined.

Here, the reduction signal frame generation unit 102 sets pixels for one line sequentially from the upper left end to the upper right end of the horizontal blanking section reduction signal 61A in the information field following SYNC. Then, when the reduction signal frame generation unit 102 finishes adding the pixels of one line to the information field, it repeats the operation of sequentially adding the pixels of the next lower line to the information field from the left end to the right end. Then, when the reduction signal frame generation unit 102 finishes adding the pixels for one line at the lowermost end to the information field, it finishes the generation of one frame, returns to the pixel at the upper left end again, and continues the generation of the next frame. .. FIG. 8 is a diagram showing a configuration example of a plurality of frames that are continuously generated.

The transmission unit 103 sequentially transmits the reduction signal frames generated by the reduction signal frame generation unit 102 to the receiver 20 via the transmission line 301. At this time, the transmission unit 103 may convert the reduction signal frame from parallel data to serial data and then transmit it to the receiver 20 in order to make the format suitable for high-speed transmission. In the present embodiment, it is assumed that the transmission line 301 is composed of an optical fiber, and the transmission unit 103 converts the reduced signal frame into an optical signal by a laser diode before transmitting it to the receiver 20. The reduced signal frame may be transmitted to the receiver 20 by the signal.

The deletion information frame generation unit 112 generates a frame including the number of pixels in the horizontal direction of the deletion area 642 as the horizontal blanking deletion amount information 111 as a deletion information frame. The format of the deletion information frame is not particularly limited, but may be the same format as the frame configuration shown in FIG. At this time, the horizontal blanking deletion amount information 111 is set in the information field by the deletion information frame generation unit 112. Alternatively, the format of the deletion information frame may be different from the frame configuration shown in FIG.

The transmission unit 113 sequentially transmits the deletion information frame generated by the deletion information frame generation unit 112 to the receiver 20 via the transmission line 302. At this time, the transmission unit 113 may convert the deletion information frame from parallel data to serial data in order to format it suitable for high-speed transmission, and then transmit it to the receiver 20. In the present embodiment, it is assumed that the transmission line 302 is composed of an optical fiber, and the transmission unit 113 converts the deletion information frame into an optical signal by the laser diode before transmitting it to the receiver 20. The deletion information frame may be transmitted to the receiver 20 by a signal.

The receiving unit 201 receives the reduced signal frame transmitted by the transmitter 10 via the transmission line 301. At this time, when the reduction signal frame is received as serial data, the receiving unit 201 converts the serial data into the same parallel data as the parallel data handled by the transmitter 10 with reference to the position of SYNC. In the present embodiment, it is assumed that the receiving unit 201 receives the reduced signal frame transmitted as an optical signal by the photodetector and converts it into an electric signal, but even if the reduced signal frame is received by the electric signal, it is assumed. Good.

The reduction signal extraction unit 202 extracts the horizontal blanking section reduction signal 61A from the reduction signal frame. More specifically, the reduction signal extraction unit 202 extracts the horizontal blanking section reduction signal 61A from the reduction signal frame by deleting the frame header (for example, SYNC) from the reduction signal frame. The horizontal blanking section reduction signal 61A extracted by the reduction signal extraction unit 202 is output to the horizontal blanking section restoration unit 203.

The receiving unit 211 receives the deletion information frame transmitted by the transmitter 10 via the transmission line 302. At this time, when the deletion information frame is received as serial data, the receiving unit 211 converts the serial data into the same parallel data as the parallel data handled by the transmitter 10 with reference to the position of SYNC. In the present embodiment, it is assumed that the receiving unit 211 receives the deleted information frame transmitted as an optical signal by the photodetector and converts it into an electric signal, but even if the deleted information frame is received by the electric signal, it is assumed. Good.

The deletion information extraction unit 212 extracts the horizontal blanking deletion amount information 213 from the deletion information frame. More specifically, the deletion information extraction unit 212 extracts the horizontal blanking deletion amount information 213 from the deletion information frame by deleting the frame header (for example, SYNC) from the deletion information frame. The horizontal blanking deletion amount information 213 extracted by the deletion information extraction unit 212 is output to the horizontal blanking section restoration unit 203.

The horizontal blanking section restoration unit 203 receives H.D. from the horizontal blanking section reduction signal 60. A process of restoring the blanking section 64 is performed to obtain a video signal 60A. More specifically, the horizontal blanking section restoration unit 203 is based on the horizontal blanking deletion amount information 213. By restoring the deleted area 642 in the blanking section 64, H.I. The process of restoring the blanking section 64 is performed to obtain the same video signal 60A as the video signal 60A handled by the transmitter 10. The video signal 60A is output to the video signal display device 50.

The video signal display device 50 displays the video signal 60A output from the receiver 20. The video signal display device 50 may be, for example, an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), an organic EL (Electro-Luminence) display, or an organic EL (Electro-Luminence) display. It may be a display device such as a projector, or it may be a hologram display device.

<2. Conclusion>
As described above, according to the embodiments of the present disclosure, H. Blanking section 64 and V.I. Video signals 60A to H.M. in a format having a blanking section 63. A horizontal blanking section reduction unit 101 that reduces the blanking section 64 to obtain a horizontal blanking section reduction signal 61A, a reduction signal frame generation unit 102 that generates a frame including a horizontal blanking section reduction signal as a reduction signal frame, and a reduction signal frame generation unit 102. A receiver (frame generator) 10 is provided.

According to such a configuration, H. Blanking section 64 and V.I. The active video region 62 of the video signal 60A having the blanking section 63 as a format can be more reliably transmitted from the transmitter 10 to the receiver 20 via the transmission line 301.

Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such examples. It is clear that anyone with ordinary knowledge in the technical field of the present disclosure may come up with various modifications or modifications within the scope of the technical ideas set forth in the claims. Of course, it is understood that it belongs to the technical scope of the present disclosure.

For example, the video signal generator 40, the horizontal blanking section reduction unit 101, the reduction signal frame generation unit 102, and the deletion information frame generation unit 112 may be mounted on separate ICs (Integrated Circuits), or any combination thereof. May be mounted on the same IC. Further, for example, the reduction signal extraction unit 202, the horizontal blanking section restoration unit 203, and the deletion information extraction unit 212 may be mounted on separate ICs, or any combination thereof may be mounted on the same IC. ..

In addition, the effects described herein are merely explanatory or exemplary and are not limited. That is, the techniques according to the present disclosure may exhibit other effects apparent to those skilled in the art from the description herein, in addition to or in place of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
A horizontal blanking section reduction unit that reduces the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section to obtain a horizontal blanking section reduction signal.
A reduction signal frame generation unit that generates a frame including the horizontal blanking section reduction signal as a reduction signal frame,
A frame generator.
(2)
The horizontal blanking section reduction unit reduces the horizontal blanking section by deleting a predetermined deletion area of the horizontal blanking section.
The frame generator according to (1) above.
(3)
The number of vertical lines in the deleted area is the same as the number of vertical lines in the video signal.
The frame generator according to (2) above.
(4)
The frame generator
It is provided with a deletion information frame generation unit that generates a frame including the number of pixels in the horizontal direction of the deletion area as horizontal blanking deletion amount information as a deletion information frame.
The frame generator according to (2) or (3) above.
(5)
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
The frame generator according to any one of (2) to (4) above.
(6)
The specific rational number is one or more of the rational numbers closest to the division result in each of the denominators.
The frame generator according to (5) above.
(7)
The specific rational number is a rational number in which the value obtained by multiplying the number of bits per pixel by the number of horizontal pixels of the video signal is a multiple of 8 among the one or more rational numbers. is there,
The frame generator according to (5) or (6) above.
(8)
The specific rational number is the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers. is there,
The frame generator according to any one of (5) to (7) above.
(9)
Obtaining a horizontal blanking section reduction signal by reducing the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section.
To generate a frame including the horizontal blanking section reduction signal as a reduction signal frame,
Frame generation method, including.
(10)
A reduction signal extraction unit that extracts a horizontal blanking section reduction signal from a reduction signal frame including a horizontal blanking section reduction signal in which the horizontal blanking section is reduced from a video signal, and a reduction signal extraction unit.
A horizontal blanking section restoration unit that obtains the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal.
A signal extraction device.
(11)
The horizontal blanking section restoration unit restores the horizontal blanking section by restoring the deleted area in the horizontal blanking section.
The signal extraction device according to (10) above.
(12)
The number of vertical lines in the deleted area is the same as the number of vertical lines in the video signal.
The signal extraction device according to (11) above.
(13)
The signal extractor
A deletion information extraction unit for extracting the horizontal blanking deletion amount information from a deletion information frame including the number of pixels in the horizontal direction of the deletion area in the horizontal blanking section as horizontal blanking deletion amount information is provided.
The signal extraction device according to (11) or (12).
(14)
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
The signal extraction device according to any one of (11) to (13).
(15)
The specific rational number is one or more of the rational numbers closest to the division result in each of the denominators.
The signal extraction device according to (14) above.
(16)
The specific rational number is the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers. is there,
The signal extraction device according to (14) or (15).
(17)
The specific rational number is the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers. is there,
The signal extraction device according to any one of (14) to (16).
(18)
Extracting the horizontal blanking section reduction signal from the reduction signal frame including the horizontal blanking section reduction signal in which the horizontal blanking section is reduced from the video signal, and
To obtain the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal,
Signal extraction methods, including.
(19)
A horizontal blanking section reduction unit that reduces the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section to obtain a horizontal blanking section reduction signal.
A reduction signal frame generation unit that generates a frame including the horizontal blanking section reduction signal as a reduction signal frame,
A transmitter including a transmitter for transmitting the reduced signal frame, and a transmitter.
A receiver that receives the reduced signal frame and
A reduction signal extraction unit that extracts a horizontal blanking section reduction signal from the reduction signal frame,
A horizontal blanking section restoration unit that obtains the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal.
An image transmission system, comprising a receiver and.
(20)
Obtaining a horizontal blanking section reduction signal by reducing the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section.
To generate a frame including the horizontal blanking section reduction signal as a reduction signal frame,
Sending the reduced signal frame to the receiver and
Receiving the reduced signal frame from the transmitter and
Extracting the horizontal blanking section reduction signal from the reduction signal frame and
To obtain the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal,
Image transmission methods, including.

1 Image transmission system 10 Transmitter (frame generator)
101 Horizontal blanking section reduction unit 102 Reduction signal frame generation unit 103 Transmission unit 111 Horizontal blanking deletion amount information 112 Deletion information frame generation unit 113 Transmission unit 20 Receiver (signal extractor)
201 Reception unit 202 Reduction signal extraction unit 203 Horizontal blanking section restoration unit 211 Reception unit 212 Deletion information extraction unit 213 Horizontal blanking deletion amount information 301 Transmission line 302 Transmission line 40 Video signal generator 50 Video signal display device 60A, 60B Video Signal 61A, 61B Horizontal blanking section reduction signal 62 video region 63 V.I. Blanking section 64 H. blinking section 641 Residual area 642 Deleted area 65 Blanking section AL Number of vertical effective lines AN Number of horizontal effective pixels HB Number of horizontal pixels TN Total number of horizontal pixels TL Total number of vertical lines VB Number of vertical lines

Claims (16)

A horizontal blanking section reduction unit that reduces the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section to obtain a horizontal blanking section reduction signal.
A reduction signal frame generation unit that generates a frame including the horizontal blanking section reduction signal as a reduction signal frame,
Bei to give a,
The horizontal blanking section reduction unit reduces the horizontal blanking section by deleting a predetermined deletion area of the horizontal blanking section.
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Frame generator. The number of vertical lines in the deleted area is the same as the number of vertical lines in the video signal.
The frame generator according to claim 1 . The frame generator
It includes a deletion information frame generation unit that generates a frame including the number of pixels in the horizontal direction of the deletion area as horizontal blanking deletion amount information as a deletion information frame.
The frame generator according to claim 1 or 2 . The specific rational number is one or more of the rational numbers closest to the division result in each of the denominators.
The frame generator according to any one of claims 1 to 3 . The specific rational number is a rational number in which the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers is a multiple of 8. is there,
The frame generator according to any one of claims 1 to 4 . The specific rational number is the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers. is there,
The frame generator according to any one of claims 1 to 5 . By deleting a predetermined deletion area of the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section , the horizontal blanking section is reduced and a horizontal blanking section reduction signal is obtained. That and
To generate a frame including the horizontal blanking section reduction signal as a reduction signal frame,
Only including,
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Frame generation method. A reduction signal extraction unit that extracts a horizontal blanking section reduction signal from a reduction signal frame including a horizontal blanking section reduction signal in which the horizontal blanking section is reduced from a video signal, and a reduction signal extraction unit.
A horizontal blanking section restoration unit that obtains the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal.
With
The horizontal blanking section restoration unit restores the horizontal blanking section by restoring the deleted area in the horizontal blanking section.
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Signal extractor. The number of vertical lines in the deleted area is the same as the number of vertical lines in the video signal.
The signal extraction device according to claim 8 . The signal extractor
A deletion information extraction unit for extracting the horizontal blanking deletion amount information from a deletion information frame including the number of pixels in the horizontal direction of the deletion area in the horizontal blanking section as horizontal blanking deletion amount information is provided.
The signal extraction device according to claim 8 or 9 . The specific rational number is one or more of the rational numbers closest to the division result in each of the denominators.
The signal extraction device according to any one of claims 8 to 10 . The specific rational number is a rational number in which the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers is a multiple of 8. is there,
The signal extraction device according to any one of claims 8 to 11 . The specific rational number is the rational number having the largest divisor of the value obtained by multiplying the multiplication result of the number of bits per pixel and the number of horizontal pixels of the video signal among the one or a plurality of rational numbers. is there,
The signal extraction device according to any one of claims 8 to 12 . Extracting the horizontal blanking section reduction signal from the reduction signal frame including the horizontal blanking section reduction signal in which the horizontal blanking section is reduced from the video signal, and
By restoring the deleted area in the horizontal blanking section, the process of restoring the horizontal blanking section is performed on the horizontal blanking section reduction signal to obtain the video signal.
Only including,
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Signal extraction method. By deleting a predetermined deletion area of the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section , the horizontal blanking section is reduced and a horizontal blanking section reduction signal is obtained. Horizontal blanking section reduction section and
A reduction signal frame generation unit that generates a frame including the horizontal blanking section reduction signal as a reduction signal frame,
A transmitter including a transmitter for transmitting the reduced signal frame, and a transmitter.
A receiver that receives the reduced signal frame and
A reduction signal extraction unit that extracts a horizontal blanking section reduction signal from the reduction signal frame,
A horizontal blanking section restoration unit that obtains the video signal by performing a process of restoring the horizontal blanking section with respect to the horizontal blanking section reduction signal by restoring the deleted area in the horizontal blanking section.
An image transmission system comprising, a receiver, and the like.
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Image transmission system. By deleting a predetermined deletion area of the horizontal blanking section from a video signal in a format having a horizontal blanking section and a vertical blanking section , the horizontal blanking section is reduced and a horizontal blanking section reduction signal is obtained. That and
To generate a frame including the horizontal blanking section reduction signal as a reduction signal frame,
Sending the reduced signal frame to the receiver and
Receiving the reduced signal frame from the transmitter and
Extracting the horizontal blanking section reduction signal from the reduction signal frame and
By restoring the deleted area in the horizontal blanking section, the process of restoring the horizontal blanking section is performed on the horizontal blanking section reduction signal to obtain the video signal.
Only including,
The number of horizontal pixels in the deletion region is the transmission capacity of the transmission path in which the reduced signal frame is transmitted from the transmitter to the receiver among the fractions whose denominator is a divisor of the number of horizontal pixels of the video signal. A multiplication result obtained by multiplying the number of horizontal pixels of the video signal by a specific rational number, which is one of one or a plurality of rational numbers smaller than the division result obtained by dividing by the transmission rate of the video signal. The number of pixels obtained by subtracting the number of pixels in the horizontal direction of the video signal.
Image transmission method.

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