WO2010023857A1

WO2010023857A1 - Semiconductor integrated circuit and transmitting device provided with same

Info

Publication number: WO2010023857A1
Application number: PCT/JP2009/004033
Authority: WO
Inventors: 三浦和也; 川端学
Original assignee: パナソニック株式会社
Priority date: 2008-08-26
Filing date: 2009-08-21
Publication date: 2010-03-04

Abstract

In a transmitting device, a semiconductor integrated circuit (10A) receives an image data signal (DT1) and outputs an image data signal (DT2) having different characteristics. A converting section (1) performs correction processing, for instance, profile correction and the like, to the image data signal (DT1) and converts the signal into an image data signal (DT2). A coefficient setting section (14A) outputs a conversion coefficient to be used for correction processing to the converting section (1). The coefficient setting section (14A) is configured to be capable of changing the set conversion coefficient, which is to be outputted to the converting section (1), corresponding to a control signal (CTL) given from the external of the semiconductor integrated circuit (10A).

Description

Semiconductor integrated circuit and transmission device having the same

The present invention relates to a digital signal transmission device, and more particularly to a transmission device used for transmission of video signals and audio signals, such as STB (Set Top Box), DVD / BD player, and DVD / BD recorder.

In recent years, images such as high-definition digital broadcasts, DVDs, and BDs have deteriorated in image quality due to various factors such as encoding noise generated by compression processing. Along with this, there is an increasing need to create sharp images with an edge by removing unnecessary noise from degraded images and excessively emphasizing important signals such as the outline of a person or a building.

Also, there are DVI (Digital Visual Interface) and HDMI (High-Definition Multimedia Interface) as standards for a transmission device and a transmission / reception device used for transmission of video signals. DVI is a standard for serial transmission of video signals. HDMI is an upward compatible standard for DVI, and can transmit audio signals in addition to video signals.

For example, Patent Document 1 describes a technique for contour correction for a video data signal.

JP-A-10-164396

In recent years, with the widespread use of flat-screen televisions, differences in video processing capabilities and display panel characteristics have become apparent in the projected video as a feature of the equipment. For example, a 65-inch plasma television and a 32-inch liquid crystal television display greatly different images even if the image input is the same. The reasons for this are as follows: 1) Video processing capability built into each television, for example, the difference in system LSI that realizes it, 2) Characteristics of plasma display and liquid crystal panel, for example, the difference between output panel characteristics and its control system LSI, 3) A difference depending on the size of the panel, for example, the size in units of one pixel is considered.

As described above, since the video display characteristics differ depending on the receiving device side, when the same video signal is output from the transmitting device, a video depending on the characteristics of the receiving device is displayed. For this reason, when uniform correction processing, for example, contour correction processing, is performed on the transmission device side, there is a problem in that video data suitable for the reception device is not necessarily output.

It is an object of the present invention to perform correction processing suitable for a receiving device in a transmission device that performs correction processing on a video data signal and transmits the video data signal, and to output a video data signal suitable for the receiving device.

In the present invention, the characteristics of the video data signal output from the transmission device can be switched according to the information specifying the reception device.

Specifically, the present invention provides the first video data signal as a semiconductor integrated circuit that receives the first video data signal and outputs a second video data signal having a characteristic different from that of the first video data signal. A conversion unit that performs a predetermined correction process on the image data and converts it into the second video data signal; and a coefficient setting unit that supplies a conversion coefficient used for the predetermined correction process to the conversion unit. The unit receives information for specifying a receiving device that receives the second video data signal from the outside of the semiconductor integrated circuit as a control signal, and changes the conversion coefficient to be given to the conversion unit according to the control signal It is configured as possible.

According to the present invention, the conversion coefficient used for the correction process can be set and changed in accordance with a control signal that is given from the outside and is information for specifying a receiving device that receives the second video data signal. Therefore, the conversion coefficient used for the correction process can be set according to the information specifying the receiving device. This makes it possible to switch the characteristics of the video data signal to be output according to the characteristics of the receiving device.

The present invention also provides a semiconductor integrated circuit that receives a first video data signal and outputs a second video data signal having a characteristic different from that of the first video data signal. A first conversion unit that performs a first correction process; a first coefficient setting unit that supplies a conversion coefficient used for the first correction process to the first conversion unit; and a first video data signal. On the other hand, a second conversion unit that performs a second correction process that is different from the first correction process, and a second coefficient setting that provides the second conversion unit with a conversion coefficient used for the second correction process. And information for specifying a receiving device that receives the second video data signal is received as a control signal from the outside of the semiconductor integrated circuit, and in response to the control signal, the first and second conversion units One of the outputs is the second video data signal To be output as a, in which a selector for selecting operation.

According to the present invention, by providing the first and second conversion units, the first correction process and the second correction process can be performed on the video data signal, and the selector is connected to the external Can be selected according to a control signal that is information for specifying a receiving device that receives the second video data signal. For this reason, it is possible to switch the type of correction processing to be performed in accordance with information specifying the receiving device. This makes it possible to switch the characteristics of the video data signal to be output according to the characteristics of the receiving device.

In addition, the present invention provides, as a transmission device, a semiconductor integrated circuit according to the present invention, a video signal source that generates the first video data signal input to the semiconductor integrated circuit, and an output from the semiconductor integrated circuit. And a control unit that generates the control signal to be input to the semiconductor integrated circuit based on information about the receiving device that receives the second video data signal.

According to another aspect of the present invention, there is provided a semiconductor integrated circuit that receives a first video data signal, performs a predetermined correction process, and outputs a second video data signal having characteristics different from those of the first video signal. A control unit that provides the semiconductor integrated circuit with a conversion coefficient used for a predetermined correction process in the semiconductor integrated circuit, the control unit specifying a receiving device that receives the second video data signal Information is received, and a conversion coefficient to be given to the semiconductor integrated circuit is generated according to the information.

According to the present invention, the control unit generates a conversion coefficient used for the correction process according to the information for specifying the receiving device. This makes it possible to switch the characteristics of the video data signal to be output according to the characteristics of the receiving device.

According to the present invention, it is possible to generate a video data signal suitable for the characteristics of the receiving device on the transmitting device side.

It is a figure which shows the structure of the transmitter which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the transmitter which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the transmitter which concerns on the 3rd Embodiment of this invention. It is a figure which shows the structure of the transmitter which concerns on the modification of 3rd Embodiment. It is a figure which shows the structure of the transmitter which concerns on the modification of 3rd Embodiment. It is a figure which shows the structure of the transmitter which concerns on the 4th Embodiment of this invention.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a configuration of a transmission apparatus according to the first embodiment of the present invention. The transmitting device in FIG. 1 transmits video data to a receiving device, for example, via a cable or wirelessly, via an interface compliant with a standard such as DVI or HDMI. The transmitted video data is displayed as video on a display device connected to the receiving device, for example. Here, the receiving device has an extended display identification data (EDID) in which information such as a displayable resolution and an audio sample rate at which sound can be output, a manufacturer of a semiconductor integrated circuit included in the receiving device, and a product number are stored. Suppose you are.

Specifically, the transmission apparatus of FIG. 1 includes a semiconductor integrated circuit 10A, a video signal source 30, and a microcomputer 40 as a control unit. The semiconductor integrated circuit 10A receives the first video data signal DT1, and outputs a second video data signal DT2 having different characteristics from the first video data signal DT1. The video signal source 30 generates the first video data signal DT1 by decoding compressed video data stored in, for example, a DVD or a BD disc. The microcomputer 40 controls operations of the semiconductor integrated circuit 10 </ b> A and the video signal source 30. Here, the microcomputer 40 has a serial interface such as I2C (Inter Integrated Circuit) to read EDID from the receiving device, and receives the EDID read from the receiving device and gives it to the semiconductor integrated circuit 10A. Control signal CTL is generated. That is, the information regarding the receiving device received by the microcomputer 40 is obtained from the receiving device. Further, the information regarding the receiving device includes information for identifying the manufacturer of the receiving device.

The semiconductor integrated circuit 10A includes a contour detection unit 11, a correction component generation unit 12, a calculator 13, and a coefficient setting unit 14A. A conversion unit that performs a contour correction process as a predetermined correction process on the first video data signal DT1 by the contour detection unit 11, the correction component generation unit 12, and the calculator 13, and converts the first video data signal DT1 into a second video data signal DT2. 1 is configured.

The contour detection unit 11 detects an edge portion corresponding to the contour of a person or a building in the video data represented by the first video data signal DT1. The correction component generation unit 12 extracts only high-frequency components of video data using, for example, HPF (High Pass Filter), and uses the extracted high-frequency components as a contour correction coefficient as a conversion coefficient given from the coefficient setting unit 14A. Multiply. As a result, a correction component for the contour correction process is generated. The computing unit 13 adds the correction component generated by the correction component generation unit 12 to the video data signal DT1 to generate the second video data signal DT2. By such an operation, sharp image data with an edge is generated in which an important signal on the image is emphasized.

The coefficient setting unit 14A is one of the

storage circuits

15a and 15b that store a plurality of contour correction coefficients (here, two coefficients A and B), and the coefficients A and B stored in the

storage circuits

15a and 15b. And a selector 16 that selects and outputs a contour correction coefficient to be supplied to the conversion unit 1. The selector 16 selects a contour correction coefficient in accordance with the control signal CTL given from the microcomputer 40.

The microcomputer 40 has a correspondence table between information for specifying the receiving apparatus and the coefficient for contour correction. Then, information for identifying the receiving device, for example, a manufacturer, a model name, a nickname, and the like is extracted from the acquired EDID. Then, referring to the correspondence table, the control signal CTL is output so as to select the contour correction coefficient corresponding to the information extracted from the EDID. Thereby, the characteristics of the video data output from the transmission apparatus can be changed according to the characteristics of the reception apparatus.

The correspondence table here may be, for example, one in which the contour correction coefficient is described for each manufacturer, or one in which the contour correction coefficient is described for each product number and each screen size. It may be.

For example, when the coefficient A is selected, the second video data signal DT2 having a sharper contour is output, while when the coefficient B is selected, the second video data signal DT2 having a slightly weaker contour. Is output. The microcomputer 40 uses the control signal CTL to control the coefficient A to be selected for a receiving device that has a sharper outline image data, and to a receiving device that has a less sharp outline image data. Controls to select the coefficient B.

Here, as information for determining whether or not video data with a sharp outline is suitable, for example, output panel characteristics of a display serving as a receiving device, screen size, presence / absence of contour correction in the receiving device, receiving device The strength of the contour correction performed in step 1 can be considered.

Generally speaking, when the number of pixels of the panel of the receiving device is the same, the size per pixel increases with the increase in screen size. In a panel composed of large pixels, compared to a panel composed of small pixels, the displayed image is relatively rough and the sharpness of the contour is visually weak. For this reason, for example, the screen size of the receiving device is recognized from the acquired information such as EDID, and the larger the screen size of the receiving device, the stronger the contour correction on the transmitting device side and the sharper the contour correction. Like that. Such control makes it possible to optimize contour correction.

In addition, when the same manufacturer manufactures the transmission device and the reception device, the contour of the reception device is extracted by extracting the manufacturer and model name of the reception device from the acquired information such as EDID. The presence / absence of correction and the intensity of contour correction performed by the receiving apparatus can be grasped. For this reason, for example, for a receiving device that performs contour correction with a strong strength, the strength of contour correction in the transmitting device is weakened, while on the other hand, for a receiving device that does not perform contour correction or a receiving device with weak contour correction strength. Thus, the strength of contour correction in the transmission device is increased. Such control makes it possible to optimize contour correction.

In the above description, the conversion coefficient used for the correction processing is the contour correction coefficient. However, as described in detail in another embodiment, the conversion coefficient is a noise correction coefficient (an example of a conversion coefficient for noise removal processing). The correction component generation unit 12 may extract only the low frequency component of the video data. In this case, for example, for a receiving apparatus that performs noise removal with a strong intensity, the intensity of noise removal in the transmitting apparatus is weakened. Thus, the strength of noise removal in the transmission apparatus is increased. Such control makes it possible to optimize noise removal.

Here, when changing the conversion coefficient such as the coefficient for contour correction and the coefficient for noise correction according to the combination of the transmission device and the reception device, the video signal processing content in the transmission device and the information on the reception device (screen size, manufacturer, A suitable setting (conversion coefficient) based on the tendency as described above may be described in the correspondence table in accordance with a combination with information including any one or more of model names and the like. Further, in the development stage of the transmission device, a suitable setting may be obtained in advance by conducting a connection experiment between the transmission device and the reception device, and the result may be held as a correspondence table.

As described above, according to the present embodiment, since the conversion coefficient used for the correction process can be set according to the information specifying the receiving device, the characteristic of the video data signal output from the transmitting device is changed to the characteristic of the receiving device. It becomes possible to switch according to. Therefore, the transmission apparatus according to the present embodiment can output a video data signal suitable for the receiving apparatus by selecting a conversion coefficient suitable for the characteristics of the connected receiving apparatus.

In the present embodiment, the coefficient setting unit 14A stores two coefficients A and B. However, three or more conversion coefficients may be stored.

(Second Embodiment)
FIG. 2 is a diagram showing a configuration of a transmission apparatus according to the second embodiment of the present invention. The transmission apparatus of FIG. 2 includes a semiconductor integrated circuit 10B having a configuration different from that of the first embodiment. The basic configuration of the semiconductor integrated circuit 10B is the same as that of the semiconductor integrated circuit 10A of FIG. 1, except that a coefficient setting unit 14B having a different internal configuration is provided instead of the coefficient setting unit 14A.

The coefficient setting unit 14B includes a coefficient generation unit 17 and a memory 18 in addition to the

storage circuits

15a and 15b and the selector 16. The coefficient generator 17 receives the control signal CTL from the microcomputer and generates a contour correction coefficient in accordance with the control signal CTL. For example, the coefficient generation unit 17 has a correspondence table between information for specifying the receiving device and the contour correction coefficient, and specifies the receiving device that receives the second video data signal DT2 as the control signal CTL. Receiving a signal indicating information for Based on the received information, a contour correction coefficient is generated with reference to the correspondence table. The generated contour correction coefficient is temporarily stored in the memory 18 and then stored as the coefficient B in the storage unit 15b. As in the first embodiment, the selector 16 selects and outputs one of the coefficients A and B stored in the

storage units

15a and 15b.

Here, the contour correction coefficient generated by the coefficient generation unit 17 is preferably stored in the memory 18 together with information indicated by the corresponding control signal CTL. As a result, for the receiving apparatus in which the contour correction coefficient has been generated in the past, the correction coefficient stored in the memory 18 can be read and used. Thereby, it is not necessary to generate the same contour correction coefficient again, so that the characteristics of the video data can be changed more quickly.

If the information for specifying the receiving device is not described in the correspondence table, the contour correction coefficient used for the receiving device considered to have characteristics close to that of the receiving device is read from the memory 18, It becomes possible to use it. Here, as a method for specifying a receiving device that is considered to have similar characteristics, for example, a method in which a manufacturer is the same, a method in which a high-order part number is the same, etc. are specified. .

As described above, according to the present embodiment, the conversion coefficient used for the correction process can be generated in accordance with the information specifying the receiving device, so that the characteristics of the video data signal output from the transmitting device are changed to the characteristics of the receiving device. It becomes possible to switch according to. In addition, even when a receiving device not included in the correspondence table is connected, a video data signal corresponding to the characteristics can be generated. Therefore, the transmitting apparatus according to the present embodiment can output a video data signal suitable for the receiving apparatus by generating a conversion coefficient suitable for the characteristics of the connected receiving apparatus.

In this embodiment, a storage circuit 15a for storing the coefficient A is also provided separately from the storage circuit 15b for storing the conversion coefficient generated by the coefficient generation unit 17, but the storage circuit 15a may be omitted. Absent. However, by providing the storage circuit 15a, the storage circuit 15a can be used, for example, for storing the basic value of the conversion coefficient or for storing the conversion coefficient set by the user.

(Third embodiment)
FIG. 3 is a diagram showing a configuration of a transmission apparatus according to the third embodiment of the present invention. The transmission apparatus of FIG. 3 includes a semiconductor integrated circuit 10C having a configuration different from those of the first and second embodiments. The semiconductor integrated circuit 10C includes a noise detection unit 21, a correction component generation unit 22, a selector 23, and a storage circuit 24 in addition to the components of the semiconductor integrated circuit 10B of FIG. The noise detection unit 21, the correction component generation unit 22, and the arithmetic unit 13 perform a noise removal process as a second correction process on the first video data signal DT1 and convert it into a second video data signal DT2. Two conversion units 2 are configured.

In the configuration of FIG. 3, the second conversion unit 2 and the conversion unit 1 as the first conversion unit that performs contour correction processing as the first correction processing on the first video data signal DT1 are used for calculation. The device 13 is shared. Then, the selector 23 selects either the output of the correction component generation unit 12 or the output of the correction component generation unit 22 in accordance with the control signal CTL, and supplies it to the calculator 13. That is, the selector 23 performs a selection operation according to the control signal CTL so that either the output of the first conversion unit 1 or the output of the second conversion unit 2 is output as the second video data signal DT2. . Of course, an arithmetic unit may be provided in each of the first and

second conversion units

1 and 2, and a selector that selects one of the outputs of these two arithmetic units by the control signal CTL may be provided.

The noise detection unit 21 detects a part including noise in the video data represented by the first video data signal DT1. The correction component generation unit 22 extracts only the low frequency component of the video data using, for example, LPF (Low Pass Filter), and the extracted low frequency component is stored in the storage circuit 24 as the second coefficient setting unit. Multiply the noise correction coefficient as the conversion coefficient. As a result, a correction component for noise removal processing is generated. The calculator 13 adds the correction component generated by the correction component generator 22 to the video data signal DT1, thereby generating the second video data signal DT2.

As described above, according to the present embodiment, it is possible to switch the type of correction processing to be performed on video data in accordance with information specifying a receiving device. Therefore, the transmission apparatus according to the present embodiment can output a video data signal suitable for the receiving apparatus by selecting a correction process suitable for the characteristics of the connected receiving apparatus.

Furthermore, at least one of the coefficient setting units that give the conversion coefficient to the first and

second conversion units

1 and 2 is configured to be able to change the setting of the conversion coefficient to be given according to the control signal CTL. Is preferred. Thereby, since the conversion coefficient used for the correction process can be set according to the information specifying the receiving device, a video data signal suitable for the receiving device can be output. For example, in the configuration of FIG. 3, a coefficient generation unit 14 </ b> B similar to the configuration of FIG. 2 is provided for the first conversion unit 1.

Further, as in the configuration of FIG. 4, the second conversion unit 2 may be provided with a second coefficient setting unit 24A having the same configuration as the coefficient setting unit 14A in the configuration of FIG. The second coefficient setting unit 24A includes

storage circuits

25a and 25b that store a plurality of noise correction coefficients (here, two coefficients C and D), and coefficients C and D stored in the

storage circuits

25a and 25b. A selector 26 that selects and outputs any one of them as a noise correction coefficient to be given to the conversion unit 2 is provided. The selector 26 selects a noise correction coefficient in accordance with the control signal CTL given from the microcomputer 40.

Alternatively, as in the configuration of FIG. 5, the second conversion unit 2 may be provided with a second coefficient setting unit 24B having the same configuration as the coefficient setting unit 14B in the configuration of FIG. The second coefficient setting unit 24B includes a coefficient generation unit 27 and a memory 28 in addition to the

storage circuits

25a and 25b and the selector 26. The coefficient generation unit 27 receives a control signal CTL from the microcomputer and generates a noise correction coefficient in accordance with the control signal. The generated noise correction coefficient is temporarily stored in the memory 28 and then stored as the coefficient D in the storage unit 25b. In addition, the noise correction coefficient generated by the coefficient generation unit 27 is preferably stored in the memory 28 together with information indicated by the corresponding control signal CTL.

In the present embodiment, either one of the contour correction process and the noise removal process is selected, but both may be selectable. It is also possible to select one of three or more types of correction processes.
(Fourth embodiment)
FIG. 6 is a diagram showing a configuration of a transmission apparatus according to the fourth embodiment of the present invention. In the configuration of FIG. 2 according to the second embodiment, the coefficient generation unit 17 is provided inside the semiconductor integrated circuit 10B, and the coefficient generation unit 17 generates a conversion coefficient corresponding to the receiving device. In contrast, in the configuration of FIG. 6, the microcomputer 40 </ b> A as the control unit generates a conversion coefficient corresponding to the receiving device.

6, the semiconductor integrated circuit 10 includes a conversion unit 1 having a contour detection unit 11, a correction component generation unit 12, and a calculator 13, as in the above-described embodiments. In addition, a storage circuit 14 is provided that gives the conversion unit 1 a contour correction coefficient as a conversion coefficient. Then, the microcomputer 40A receives the EDID, and generates a contour correction coefficient according to information for specifying the receiving device obtained from the EDID. For example, the microcomputer 40A has a correspondence table between information for specifying a receiving device and a contour correction coefficient, and generates a contour correction coefficient with reference to the correspondence table. The generated contour correction coefficient is temporarily stored in the memory 41 and then given to the semiconductor integrated circuit 10.

Similarly to the second embodiment, the contour correction coefficient generated by the microcomputer 40A is preferably stored in the memory 41 together with information for specifying the receiving device. As a result, for the receiving apparatus in which the contour correction coefficient has been generated in the past, the correction coefficient stored in the memory 41 can be read and used. Further, when the information for specifying the receiving device is not described in the correspondence table, the contour correction coefficient used for the receiving device considered to have characteristics close to that of the receiving device is read from the memory 41, It becomes possible to use it.

As described above, according to the present embodiment, as in the second embodiment, the conversion coefficient used for the correction process can be generated according to the information specifying the receiving device, so that the video data output by the transmitting device It is possible to switch the signal characteristics according to the characteristics of the receiving apparatus. In addition, even when a receiving device not included in the correspondence table is connected, a video data signal corresponding to the characteristics can be generated. Therefore, the transmitting apparatus according to the present embodiment can output a video data signal suitable for the receiving apparatus by generating a conversion coefficient suitable for the characteristics of the connected receiving apparatus.

In the above-described embodiments, the

microcomputers

40 and 40A receive the EDID read from the receiving device. However, the present invention is not limited to this, and the receiving device is specified by other means. Information may be acquired. For example, the user may input information specifying the receiving device via a remote control device or the like. In this case, for example, a list of information for specifying the receiving device may be displayed on a graphical user interface (GUI), and the user may select one of the items. When the transmission device and the reception device according to the embodiment conform to the HDMI standard, information specifying the reception device may be acquired from the reception device by using CEC (Consumer Electronics Control) as another means.

In each of the above embodiments, the correction processing performed in the semiconductor integrated circuit is the contour correction processing and noise removal processing. However, the present invention is not limited to this, and other correction processing is performed. Even if it is a thing, it is applicable. Other correction processes include, for example, contrast correction, brightness correction, and color correction (increasing red and blue). For example, contrast correction is performed by multiplying the difference between the luminance of each pixel and the reference luminance by a coefficient for contrast correction, and this coefficient may be set according to the characteristics of the receiving apparatus.

In the present invention, video data suitable for the characteristics of the receiving device can be transmitted, which is useful for DVD / BD players, recorders, and the like that transmit DVI signals or HDMI signals to various display devices.

DT1 First video data signal DT2 Second video data signal CTL Control signal 1 Conversion unit (first conversion unit)
2

2nd conversion part

10A, 10B, 10C, 10D, 10E, 10 Semiconductor integrated circuit 14A Coefficient setting part 14B Coefficient setting part (1st coefficient setting part)
15a, 15b Storage circuit 16 Selector 17 Coefficient generation unit 18 Memory 23 Selector 24 Storage circuit (second coefficient setting unit)
24A, 24B Second coefficient setting unit 30

Video signal source

40, 40A Microcomputer (control unit)
41 memory

Claims

A semiconductor integrated circuit that receives a first video data signal and outputs a second video data signal having characteristics different from those of the first video data signal;
A conversion unit that performs a predetermined correction process on the first video data signal and converts the first video data signal into the second video data signal;
A coefficient setting unit for giving a conversion coefficient used for the predetermined correction processing to the conversion unit;
The coefficient setting unit receives information for specifying a receiving device that receives the second video data signal as a control signal from the outside of the semiconductor integrated circuit, and applies a conversion coefficient to the conversion unit according to the control signal A semiconductor integrated circuit characterized in that the setting can be changed.
The semiconductor integrated circuit according to claim 1,
The coefficient setting unit
A storage circuit for storing a plurality of conversion coefficients;
A selector that selects and outputs any one of a plurality of conversion coefficients stored in the storage circuit as a conversion coefficient to be supplied to the conversion unit according to the control signal. A semiconductor integrated circuit.
The semiconductor integrated circuit according to claim 1,
The coefficient setting unit
A semiconductor integrated circuit comprising a coefficient generation unit that generates a conversion coefficient to be given to the conversion unit in accordance with the control signal.
The semiconductor integrated circuit according to claim 3.
The coefficient setting unit
A semiconductor integrated circuit comprising a memory for storing the conversion coefficient generated by the coefficient generation unit together with information indicated by the corresponding control signal.
The semiconductor integrated circuit according to claim 1,
The semiconductor integrated circuit according to claim 1, wherein the predetermined correction process in the conversion unit is a contour correction process.
A semiconductor integrated circuit that receives a first video data signal and outputs a second video data signal having characteristics different from those of the first video data signal;
A first converter that performs a first correction process on the first video data signal;
A first coefficient setting unit that gives a conversion coefficient used for the first correction processing to the first conversion unit;
A second converter that performs a second correction process different from the first correction process on the first video data signal;
A second coefficient setting unit that gives a conversion coefficient used for the second correction processing to the second conversion unit;
Information for specifying a receiving device that receives the second video data signal is received as a control signal from the outside of the semiconductor integrated circuit, and any one of the outputs of the first and second converters according to the control signal. A semiconductor integrated circuit, comprising: a selector that performs a selection operation so that the signal is output as the second video data signal.
The semiconductor integrated circuit according to claim 6.
At least one of the first and second coefficient setting units is configured to be able to change the setting of the conversion coefficient to be given to the first or second conversion unit according to the control signal. A semiconductor integrated circuit.
The semiconductor integrated circuit according to claim 6.
The first correction process in the first conversion unit is a contour correction process,
The semiconductor integrated circuit according to claim 2, wherein the second correction processing in the second conversion unit is noise removal processing.
The semiconductor integrated circuit according to claim 1 or 6,
2. The semiconductor integrated circuit according to claim 1, wherein the second video data signal conforms to a DVI standard or an HDMI standard.
The semiconductor integrated circuit according to claim 1 or 6,
A video signal source for generating the first video data signal input to the semiconductor integrated circuit;
And a control unit that generates the control signal to be input to the semiconductor integrated circuit based on information about a receiving device that receives the second video data signal output from the semiconductor integrated circuit. Transmitting device.
The transmission device according to claim 10, wherein
The transmission apparatus characterized in that the information related to the reception apparatus received by the control unit is obtained from the reception apparatus.
The transmission device according to claim 10, wherein
The information regarding the receiving device received by the control unit includes information for identifying a manufacturer of the receiving device.
A semiconductor integrated circuit that receives the first video data signal, performs a predetermined correction process, and outputs a second video data signal having a characteristic different from that of the first video signal;
A control unit that provides the semiconductor integrated circuit with a conversion coefficient used for predetermined correction processing in the semiconductor integrated circuit,
The control unit receives information for specifying a receiving device that receives the second video data signal, and generates a conversion coefficient to be given to the semiconductor integrated circuit according to the information. Transmitting device.
The transmission device according to claim 13, wherein
A transmission apparatus comprising: a memory for storing the conversion coefficient generated by the control unit together with corresponding information.
The transmission device according to claim 13, wherein
The transmitter according to claim 1, wherein the predetermined correction process in the semiconductor integrated circuit is a contour correction process.