JP2001275051A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver which presents the discrimination of received and viewed media, the operation state of the receiver in reservation operation, information sent and received by digital broadcasting, the operation state of the receiver, etc., in an easy-to-see state. SOLUTION: A back light type liquid crystal display device is used for a received information presenting means, i.e., a received information display part and a technical means is used which gives a plurality of classifications to the light emission color of the liquid crystal back light. In response to a channel selecting operation, a microprocessor which performs total system control controls the light emission color of the back light according to the information of the channel selecting operation. Reservations are also managed by the microprocessor, which controls the light emission color of the back light according to the reservation operation when the reservation is made. At the time of demultiplexing and MPEG decoding in digital broadcast reception, the resolution and format of a video signal and discrimination information on a broadcasting type such as television broadcasting, radio broadcasting, or data broadcasting are detected and those pieces of information are gathered by the microprocessor from the reception part and decoding part to control the back light color according to them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiver and a device with a built-in digital broadcast receiving function (built-in television receiver, built-in recording device, etc.). The present invention relates to a device capable of notifying a status of reception, execution of reservation to an external device, reception of a plurality of video / audio formats, and the like.

[0002]

2. Description of the Related Art Conventional television receivers use UHF /
Based on VHF terrestrial broadcasting, some models have been able to receive satellite broadcasting (BS broadcasting) and cable TV (CATV) broadcasting.

[0003] These broadcasts are analog broadcasts, and although the transmission systems of terrestrial waves, satellites, cables, and the like are different, there is no essential difference in the reproduced signals themselves.

That is, the number of channels is limited even if the terrestrial wave and the BS broadcast wave are combined, and even in the case of CATV broadcasting capable of broadcasting a certain number of channels, the CAT
Because V broadcast retransmits terrestrial and BS broadcasts,
Most of the CATV broadcast receivers have completed reception only on CATV. As described above, since the number of channels is limited, the user does not have to pay much attention to the transmission system of the received broadcast, that is, the receiving medium, and the channel number is always displayed by a device such as an LED. Has been simplified in the direction of using a screen display function of displaying a picture together with a picture on a cathode ray tube of a television receiver.

[0005] However, with the recent technological progress, the conventional analog broadcasting is shifting to digital broadcasting,
First of all, in Japan, the digitalization of broadcasting started from CS broadcasting by communication satellites in 1996. In the future, digitalization of BS broadcasting in 2000, digitalization of terrestrial broadcasting in 2003, and digitalization of broadcasting will continue. Is going to advance.

FIG. 9 shows an example of the appearance of a CS digital broadcast receiver that has already started broadcasting.

In this example, not a television receiver but a single receiver generally called a digital tuner is shown. Here, reference numeral 42 arranged at the center of the front of the main body is a reception information display section of the receiver, and FIG. 10 shows an example of the reception information display section 42. 9 and 10 use a fluorescent display tube.

[0010] As can be seen from FIG. 10, in CS digital broadcasting, digitalization has realized more than 100 channels, and the channel number has become three digits, and English subtitles, copy guard control, mail, etc. Services that were not available in analog broadcasting until now have been realized. For this reason, it is becoming common for CS digital broadcast receivers to collectively display such information collectively.

[0009]

As described above, similar to the conventional analog broadcast receivers, digital broadcasts which have been supported only by about two to three point-emitting LEDs and a screen display function called each time. Consider the reception information presentation means of the receiver.

[0010] Here, the future BS digital broadcasting, terrestrial digital broadcasting, and digital CATV broadcasting will also have multiple channels, and it is highly likely that a 3-digit channel number will be assigned similarly to CS digital. Considering that there is a possibility that broadcasts having different characteristics, such as broadcast, independent audio broadcast, and data broadcast, may be sent together, the above-described reception information presentation means is not sufficient. Therefore, the means for presenting received information corresponding to the above possibilities becomes more and more important, and how to realize received information in an easy-to-understand and efficient manner along with the identification of the receiving transmission method, that is, the receiving medium, will be studied in the future. This can be said to be a major challenge for broadcast-capable receivers.

[0011] Further, with the increase in the number of channels, reservation reception,
It is conceivable that the recording reservation is also controlled on the receiver side,
Presentation of this operation situation is also one of the issues.

Digital broadcasting is one of the features of other channels, but it is expected that conventional recording equipment is often used for recording. In this case, there is a high possibility that the conventional recording device does not support digital broadcast reception,
For such a device for recording, at the time of reservation, it is necessary to receive a broadcast by a digital broadcast receiver and control these devices as necessary, but in a conventional analog broadcast receiver, Generally, such a function was not supported.
Some CS digital broadcast receivers display the reservation operation status in a fixed segment display such as “reservation” or “recording” as shown in the display contents of FIG. 10, but one of many display contents is as follows. It is not easy to see, poor visibility,
Operation status cannot be confirmed.

However, as described above, since it is necessary to perform recording on a conventional recording device, this confirmation of the reservation execution state is performed by:
Originally, it is necessary to give more importance to this, and improving the visibility is also one of the issues to be improved in the digital broadcast receiver.

As can be seen from the display contents of FIG. 10, the current CS digital broadcasting receiver displays several functions unique to digital broadcasting, such as a display with copy guard, a display with subtitles, and an incoming mail display. However, information presentation of video formats such as HD (high definition) broadcasting, also called Hi-Vision, which is planned to be supported in future BS digital broadcasting and terrestrial digital broadcasting, and NTSC-level SD (standard) broadcasting, which is the current broadcasting Also, no consideration is given to the identification of digital audio broadcasts and data broadcasts that are broadcast together with digital television broadcasts.

Therefore, presenting the received information transmitted in such digital broadcasting and the operation status of the receiver in an easy-to-understand manner is also one of the problems to be improved.

An object of the present invention is to provide a digital broadcast receiver which facilitates discrimination of a receiving medium being viewed in order to solve the above-mentioned problems.

Another object of the present invention is to provide a digital broadcast receiver which presents the operation status of the receiver at the time of executing a reservation operation in an easily understandable manner.

Another object of the present invention is to provide a digital broadcast receiver for presenting reception information transmitted by digital broadcast and an operation state of the receiver in an easy-to-understand manner.

[0019]

In order to achieve the above-mentioned object, the present invention employs the following technical means.

In digital broadcasting, there are at least three-digit channel numbers, and there is a high possibility that the same channel number is used in different transmission systems, that is, different broadcasting media. Has been expanded and the amount of presentation information related to reception has also increased. Therefore, a backlight-type liquid crystal display device (LCD) has been adopted for the reception information display section serving as reception information presentation means, and the emission color of the backlight is classified into a plurality of colors. Use technical means.

In a digital broadcast receiver, the role of a microprocessor that supervises system control becomes even more important than in a conventional analog broadcast receiver, and the microprocessor controls a channel selection operation. By controlling the emission color of the backlight based on the information, it is possible to realize the presentation, that is, the identification of the reception medium by the backlight color.

In the digital broadcast receiver, the reservation execution management is also performed by the microprocessor that controls the system control. Therefore, by performing simultaneous control during the reservation execution processing,
Control of the emission color of the backlight according to the reservation operation can also be realized.

In digital broadcasting, an MPEG2 system of an international standard is generally employed, and video and audio signals are encoded, compressed and multiplexed by MPEG encoding and transmitted. For this reason, when demultiplexing at the time of reception and when decoding MPEG, the resolution of the video signal,
It is possible to identify the format or the broadcast type of TV broadcast, radio broadcast or data broadcast, and the received information is picked up by the microprocessor from the receiving unit and decoding unit, and the backlight color is controlled in the same way as the presentation of the above received media By doing so, presentation of received information and the operation status of the receiver can also be realized.

In recent years, LEDs have been mainly used as backlights for liquid crystal display devices. However, with the advent of blue LEDs, fine color expression is also possible by using multiple colors of LEDs and adding colors. It is becoming. Therefore, it is possible to realize the above-described identification of the receiving medium, the reception information, and the presentation of the operation status of the receiver by individually or in combination of the number of colors of the LED used.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a digital broadcast receiver according to the present invention will be described with reference to the block diagram of FIG. The present embodiment is suitable for discriminating a transmission method of a received broadcast, that is, a reception medium when receiving a broadcast by a plurality of transmission methods.

In the figure, 1 is a channel selection operation input unit, 2 is a system control unit, 3 is a liquid crystal backlight color control unit, 4 is a liquid crystal backlight light emitting unit, 5 is a liquid crystal backlight unit, and 6 is a liquid crystal display control unit. , 7 are liquid crystal display units, 8 and 9 are transmission line inputs, 1
Reference numerals 0 and 11 denote receiving units, 12 denotes a video / audio signal selection and processing unit, 13 denotes a video signal processing / output unit, and 14 denotes an audio signal processing / output unit.

In the embodiment shown in FIG. 1, there are two types of broadcast transmission systems, and the respective transmission path inputs are input from 8 and 9. As a specific example, it can be considered that one is terrestrial broadcasting and the other is satellite broadcasting, and it is assumed that at least one is digital broadcasting.

Broadcast waves input from the transmission path inputs 8 and 9 are input to receiving sections 10 and 11 for performing reception signal processing, respectively, to obtain a video signal and an audio signal. This video
The audio signal is input to the video / audio signal selection and processing unit 12, and one system of video / audio signal is obtained.
Further, the video and audio signals are processed by video signal processing and
The signal is input to the output unit 13 and the audio signal processing / output unit 14, and is output after signal processing.

Normally, the video signal output and the audio signal output are output to a video display device such as a cathode ray tube and a speaker in the case of a television receiver, and a device having only a receiving function such as a digital tuner is directed to an external device. Signal is output.

On the other hand, control of the receiving units 10 and 11 and selection of video / audio signals and signal selection / processing by the processing unit 12
The signal processing is controlled by a tuning control signal from the system control unit 2, and the tuning control signal is generated by an input signal from a tuning operation input unit 1 that receives a tuning operation by a user. Generally, a microprocessor is used for the system control unit 2, and the channel selection operation input unit 1 is configured by an input device of an infrared signal from a remote controller, an operation button provided on a receiver main body, and the like.

Further, the system control section 2, which controls the control of the entire system, controls the liquid crystal display section 7 and the liquid crystal backlight section 5, which display received information such as channel numbers, in addition to the channel selection control. The display content of the liquid crystal display unit 7 is controlled via the liquid crystal display control unit 6, and the liquid crystal backlight unit 5 is controlled by the system control unit 2 which controls the liquid crystal backlight color control unit 3 which is a component thereof. In response to this, the liquid crystal backlight color control unit 3 controls the emission color of the liquid crystal backlight light emitting unit 4 which is also a component. This backlight color is, for example, capable of emitting two colors. When a broadcast wave input from the transmission line input 8 is received, one backlight color is input from the transmission line input 9. When receiving broadcast waves,
The other backlight color can be emitted.

Therefore, by adopting such a configuration, the broadcast wave being received, that is, the receiving medium, the display content of the liquid crystal display for displaying the received information, and the backlight color of the liquid crystal can be changed by the user's tuning operation. It becomes possible to associate.

In digital broadcasting, received information is larger than that in conventional analog broadcasting. Therefore, it is very effective to employ a liquid crystal display device having a high degree of freedom in information display capability. Since there is a high possibility that the channel numbers and the like to be duplicated are also duplicated, the method of identifying the received media based on the backlight color is extremely effective.

As described above, according to the present embodiment, the liquid crystal display for displaying the reception information and the backlight capable of emitting a plurality of colors are controlled in accordance with the selection of the channel. A digital broadcast receiver that can easily identify information and a receiving medium being received can be realized.

FIG. 2 is a block diagram illustrating a digital broadcast receiver according to a first embodiment of the present invention, similarly to FIG. 1. The difference from FIG.
6 shows an example corresponding to three transmission systems, that is, reception media by adding 6.

In this example, since there are three receiving media, the liquid crystal backlight unit 5 needs at least three or more luminescent colors.

As described above, even if the number of receiving media is increased, the present invention can be realized as long as the number of emitted colors can be realized. Further, when a large number of luminescent colors cannot be obtained due to a limitation of the LED or the like, it is also possible to realize a pseudo multi-color by utilizing the change of the luminescent brightness.

FIG. 3 shows an example of the configuration of a digital broadcast receiving unit according to the present invention.
0 represents a digital broadcast receiving unit, and shows an example of an internal configuration. In the figure, 17 is a tuner section, 18 is a digital demodulation and error correction section, 19 is a descrambling section, 20 is a transport / demultiplexer section, 21 is an MPEG video / video section.
An audio decoder unit 22 is a video signal DA converter unit, 2
Reference numeral 3 denotes an audio signal DA converter unit, 2 denotes a system control unit, 8 denotes a transmission line input, and 10 denotes a receiving unit.

The example of FIG. 3 shows a digital broadcast receiving unit based on a general MPEG2 system.

The digitally modulated signal input from the transmission line input 8 is converted into an IQ signal by a tuner unit 17, and this signal is input to a digital demodulation and error correction unit 18, where it is digitally demodulated and subjected to error correction processing. Will be The digital signal after the error correction is input to the descrambler 19, and if it is encrypted, the code is decrypted. The digital signal is also input to the transport / demultiplexer 20 at the next stage, where the multiplex is demultiplexed. , MPEG-encoded video / audio signal data and the like. The separated video / audio signal data is input to an MPEG video / audio decoder unit 21 and is decoded into a digital video / audio signal, and is converted into a video signal DA converter unit 22 and an audio signal DA converter unit 23, respectively. Is entered into
The digital-to-analog conversion is performed to obtain an analog video / audio signal.
Each component of the receiving unit 10 actually receives a control signal from the system control unit 2 and performs respective signal processing.

In the digital broadcast receiving section, the difference due to the transmission method of the broadcast wave is generally summarized in the transmission frequency and the modulation method. Therefore, in practice, the transmission except for the tuner section 17 and the digital demodulation and error correction section 18 is performed. In many cases, the configuration is the same regardless of the method. In an actual receiver, the descrambling unit 19 converts the video signal DA converter unit 22
Up to about three LSI components
In general, it is composed of

FIG. 4 shows the embodiment of FIG.
1 shows an example of the configuration of the receiving units 10 and 11 and the video / audio signal selection and processing unit 12 when receiving digital broadcasting. When both of the receiving units are digital broadcasting receiving units, the receiving units are respectively constituted only by tuners 17 and 24 and digital demodulating and error correcting units 18 and 25 as shown in FIG. , Video signal DA converter section 22, audio signal D
The configuration up to the A-converter unit 23 can be shared to simplify the configuration. In this case, the descrambling unit 19 and subsequent units can be regarded as the video / audio signal selection and processing unit 12.

Even when both the receiving units 10 and 11 receive digital broadcasting, the respective configurations can be as shown in FIG.

FIG. 5 shows an embodiment of a liquid crystal backlight portion capable of emitting multicolor light, which is a feature of the present invention.

In the figure, reference numerals 26 and 27 denote backlight color control signal inputs, reference numerals 28 and 29 denote NPN transistors, and reference numerals 30 and 31.
Is a resistor, 32 and 33 are light emitting diodes, 34 is a DC power supply, and 35 is a ground, which corresponds to the liquid crystal backlight color control unit 3, the liquid crystal backlight light emitting unit 4, and the liquid crystal backlight unit 5 in FIGS. The parts to be described are surrounded by dotted lines and given the same numbers. Also, the backlight color control signal input 26 of FIG.
Reference numeral 27 is independently described, but actually corresponds to a control signal input to the liquid crystal backlight color control unit 3 by the system control 2 in FIG.

Backlight color control signal inputs 26 and 27
Are connected to the bases of NPN transistors 28 and 29, respectively, the collectors of NPN transistors 28 and 29 are connected to one end of resistors 30 and 31, respectively, and the other ends of resistors 30 and 31 are connected to light emitting diodes 32 and 29, respectively.
33, the light emitting diodes 32 and 33
Is connected to the positive side of a DC power supply 34, and the negative side of the DC power supply 34 is connected to NPN transistors 28 and 29.
And is grounded at 35.

With this configuration, when a control signal (high level) is input to the backlight color control signal input 26,
The NPN transistor 28 is turned on, a current flows from the DC power supply 34 to the light emitting diode 32 and the resistor 30, and the light emitting diode 32 emits light. Backlight color control signal input 2
Similarly, when a control signal (high level) is input to 7, the NPN transistor 29 is turned on, a current flows from the DC power supply 34 to the light emitting diode 33 and the resistor 31, and the light emitting diode 33 emits light. A control signal (high level) is applied to both of the backlight color control signal inputs 26 and 27.
Is input, the light emitting diode 32,
33 will emit light simultaneously.

Here, light emitting diodes of different light emitting colors are selected as the light emitting diodes 32 and 33, and the light emitting colors are light emitting color 1 and light emitting color 2, respectively. Is the emission color 3, this configuration allows the backlight color control signal inputs 26, 2
With the combination of the seven control inputs, the emission color of the backlight unit can be controlled in three ways: emission color 1, emission color 2, and emission color 3. When both control inputs are absent (low level), the light is turned off. When this is included, four kinds of backlight emission control can be performed.

As described above, in the embodiment of the liquid crystal backlight section shown in FIG. 5, the backlight color control signal input is controlled by two systems of 26 and 27, that is, 2-bit control. Can be chosen according to the number of In addition, according to the method of changing the light emission color, the method of changing the current flowing for each light emitting diode can further increase the number of light emission colors even with a small number of light emission colors of the light emitting diode. If the luminance is insufficient, the luminance can be increased by connecting light emitting diodes in parallel.

Next, the second digital broadcast receiver of the present invention will be described.
Will be described with reference to the block diagram of FIG.
The present embodiment is suitable for determining the reservation execution status at the time of executing reservation, which is one of the features of the digital broadcast receiver.

In the embodiment of FIG. 6, the reservation information storage unit 36 connected to the system control unit 2 for storing reservation information set by the user and the system control unit 2 shown in FIG. An external device control unit 37 which controls the external device under control, and an external device control output 3 for outputting a signal for controlling the externally connected device from the external device control unit 37
8 is added.

Since the configuration is the same as that shown in FIG. 1, the transmission line inputs 8 and 9 and the reception units 10 and 11 for performing reception signal processing,
The channel selection operation and signal processing operation performed by the audio signal selection and processing unit 12, the video signal processing / output unit 13, the audio signal processing / output unit 14, and the like are the same, and thus will not be described here.

As will be described later, the control purpose of the liquid crystal backlight unit is different, but the system control unit 2 which controls the entire system controls the liquid crystal display unit 7 via the liquid crystal display control unit 6 to control the liquid crystal backlight unit. The control of the liquid crystal backlight light emitting unit 4 via the light color control unit 3 is the same.

The present embodiment is characterized in that the reservation information storage section 36 is provided as described above, but the reservation information stored in the reservation information storage section 36 is as follows.
An input signal from the channel selection operation input unit 1 that receives a user channel selection operation is stored via the system control unit 2. Here, since the channel selection operation input unit 1 has the same configuration as that of FIG. 1, the channel selection operation input unit 1 is also used for receiving a channel selection operation input.

Here, since the reservation registration operation in the case of the digital broadcast receiver is generally performed in an interactive manner with the screen by transmitting the program guide information and the like, the channel selection operation input unit 1 selects the screen. , Or a signal of a decision operation. Therefore, the channel selection operation input unit 1 may be the same as that provided in many products even in the conventional analog broadcast receiver. In particular, it is not necessary to provide a new function only for this reservation registration. Absent.

With the above configuration, in this embodiment, when the reservation execution time comes, the system control unit 2 that controls the entire system based on the reservation information stored in the reservation information storage unit 36, In addition to outputting an external device control signal from the external device control output 38 via the, the liquid crystal display unit 7 and the liquid crystal backlight unit 5 for displaying received information such as a channel number are also controlled. The liquid crystal backlight unit 5 is controlled by the system control unit 2 which controls the liquid crystal backlight color control unit 3 which is a component of the liquid crystal backlight unit 5. Controlling the emission color of the light emitting section 4 is performed in the same manner as in the first embodiment, but in this case, the reserved color is not changed according to the receiving medium by the channel selection operation. Control is performed so that the light emission color being executed is changed from the light emission color other than that for which reservation is being executed. Therefore, by adopting such a configuration, the operation status as to whether or not the reservation is being performed can be recognized only by looking at the liquid crystal display unit, and it is easy to confirm whether or not the reservation is normally performed.

As described above, according to the present embodiment, the backlight color of the liquid crystal display unit changes according to the reservation execution operation status, so that a digital broadcast receiver that can easily grasp the reservation execution operation status is provided. realizable.

In FIG. 6, although the external device control section 37 and the external device control output 38 are also constituent elements, since they relate to the operation state identification of reservation execution, a configuration without these components is also conceivable. Although the reservation information storage unit 36 is an independent component in this description, it may actually be included in a memory included in the system control unit 2.

Further, in FIG. 6, since all the components of FIG. 1 are included, the change in the backlight color of the liquid crystal display unit according to the channel selection according to the first embodiment described with reference to FIG. Can also be used in combination with the identification of the receiving medium by. In this case, one more color may be prepared in addition to the number of backlight colors required for the embodiment of FIG.

Next, the third digital broadcast receiver of the present invention will be described.
Will be described with reference to a block diagram of FIG.
In the present embodiment, the current reception status at the receiver, such as a plurality of types of video formats that are the characteristics of digital broadcasting, and types of television broadcasting, audio broadcasting, and data broadcasting that are also mixed, which are the same, are also described. This is suitable for the determination.

In this embodiment, the digital broadcast receiving unit is 1
The system control unit 2 that controls the entire system based on the configuration of the example of the digital broadcast receiving unit based on the general MPEG2 system shown in FIG. 7 is provided with a configuration for controlling the liquid crystal backlight light emitting unit 4 via the liquid crystal backlight color control unit 3.

In FIG. 7, a digitally modulated signal input from a transmission line input 8 is converted into a tuner 17, a digital demodulation and error correction unit 18, a descramble unit 19, a transport / demultiplexer unit 20, an MPEG video / audio decoder. The video signal D is digitally processed by the
An A / A converter unit 22 and an audio signal are input to a D / A converter unit 23, D / A converted to obtain an analog video / audio signal, and the components from the tuner unit 17 to the MPEG video / audio decoder unit 21 are system components. The point controlled by the control unit 2 is as described with reference to FIG.

In this embodiment, the information relating to the reception separated by the transport / demultiplexer unit 20 and the decoding at the time of decoding the video / audio signal by the MPEG video / audio decoder unit 21 are performed while the individual components are kept as they are. A route is provided for sending information about the system controller 2 to the system controller 2. With the addition of this configuration, the system control unit 2 can recognize the type of broadcast such as TV broadcast, audio broadcast, and data broadcast from the transport / demultiplexer unit 20, The format, that is, identification information of HD (high definition) broadcast or SD (standard) broadcast can be obtained.

With the above configuration, the system control unit 2 having obtained various received information also controls the liquid crystal backlight unit 5 according to a predetermined rule based on the information.

That is, the liquid crystal backlight unit 5 is controlled by the system control unit 2 which controls the liquid crystal backlight color control unit 3, which is a component of the liquid crystal backlight unit 5, and the liquid crystal backlight color control unit 3 receives the same configuration. Controlling the emission color of the liquid crystal backlight light-emitting unit 4 of the element is performed in the same manner as in the first and second embodiments, but in this case, the emission color is changed according to the received information of the digital broadcast. Control to change.

As a specific example, in the case of the operation relating to the video format, the emission color is 1 when receiving HD (high definition) broadcast, and 2 when receiving SD (standard) broadcast. In addition, in the case of the operation related to the broadcast type, the television broadcast emits light color 1, the audio broadcast emits light color 2, and the data broadcast emits light color 3.
And so on. Alternatively, these two examples may be combined, or additional information may be added.

As described above, according to the present embodiment, the backlight color of the liquid crystal display unit changes according to the digital broadcast receiving operation status, so that the digital broadcast receiving operation status can be easily grasped. A broadcast receiver can be realized.

Further, in the example of FIG. 7, the digital broadcast receiving unit is described as one system, but two or more systems may be used. In that case, the configuration of FIG. 4 can be used as necessary.

Next, the fourth digital broadcast receiver of the present invention will be described.
Will be described with reference to the block diagram of FIG.
This embodiment is an extension of the operation of the embodiment of FIG. 7 relating to the video format of digital broadcasting to a video input signal from an external device, as in the third embodiment. This is suitable for discrimination.

In the embodiment shown in FIG. 8, the external device signal input 39 and the external input signal processing section 4 shown in FIG.
0 external input signal processing system and video format detection unit 4
1 is added.

Since the configuration is the same as that of FIG. 1, the purpose of controlling the liquid crystal backlight is different. However, the system control unit 2 which controls the entire system controls the liquid crystal display unit 7 via the liquid crystal display control unit 6. The configuration itself for controlling the liquid crystal backlight light emitting unit 4 via the liquid crystal backlight color control unit 3 is the same. However, the signal flow slightly changes due to the addition of the external input signal processing system.

As in FIG. 1, if there are two types of broadcast transmission systems, the respective transmission path inputs are input from 8 and 9.
On the other hand, an external input signal is input from an external device signal input 39.

The broadcast waves input from the transmission line inputs 8 and 9 are input to the receiving units 10 and 11 for performing reception signal processing, respectively, and the external input signal input from the external device signal input 39 is processed by the external input signal processing. The video signal and the audio signal are input to the unit 40, respectively. The video / audio signal is input to the video / audio signal selection and processing unit 12, where one video / audio signal is obtained.
Further, the video signal is input to the video signal processing / output unit 13 and the video format detection unit 41, and the audio signal is input to the audio signal processing / output unit 14.

Here, the video signal output and the audio signal output from the video signal processing / output unit 13 and the audio signal processing / output unit 14 are output to a video display device such as a cathode ray tube and a speaker in the case of a television receiver. A device having only a receiving function, such as a digital tuner, outputs a signal to an external device in the same manner as in the first and second embodiments.

On the other hand, the video format detecting section 41 detects the video format, that is, H, from the input video signal.
The identification information of D (high definition) broadcast or SD (standard) broadcast is obtained. This video format can be detected by using the frequencies of the horizontal and vertical synchronization signals of the video signal.

The video format information obtained by the video format detection unit 41 is sent to the system control unit 2 which controls the control of the entire system.
Controls the liquid crystal backlight unit 5 based on the information according to a predetermined rule.

The liquid crystal backlight unit 5 is controlled by the system control unit 2 which controls the liquid crystal backlight color control unit 3 which is a component of the liquid crystal backlight unit 5. The operation performed by controlling the emission color of the liquid crystal backlight light-emitting unit 4 is the same as in the first and second embodiments. In this case, the emission color is changed according to the video format information. Control.

As a specific example, as described in the third embodiment, the emission color is 1 when receiving HD (high definition) broadcast, and the emission color 2 when receiving SD (standard) broadcast. .

Therefore, by adopting such a configuration, regardless of whether a broadcast wave is received or an external input signal is reproduced,
The video format of the video signal can be identified. In addition, when receiving digital broadcasts, SD (standard) broadcasts can be HD
Even if the video is played back after converting it to a resolution similar to (high definition) broadcasting, the video format before conversion can be grasped, so whether an original is HD (high definition) or SD (standard) can be determined from an external device. Can be grasped including the analog signal.

As described above, according to the present embodiment, the backlight color of the liquid crystal display changes according to the video format of the video signal regardless of whether the broadcast is digital broadcast or analog broadcast. It is possible to realize a digital broadcast receiver that can easily grasp the video quality of the digital broadcast.

In the example of FIG. 8, the broadcast receiving unit has two systems. However, three or more systems may be used, and the external input signal processing system may be one system. However, two or more systems may be used.

In each of the first to fourth embodiments described above, the emission color of the backlight of the liquid crystal display unit is as follows.
It is intended to present various operation states of the receiver.

Each of the inventions can be realized alone or in combination, and in any case, a desired operation situation can be easily and reliably presented to the user.

In the present description, the expression "backlight" has been unified. However, the backlight of the liquid crystal display section has recently become the mainstream of the sidelight method of irradiating from the side. This side light system is also included.

[0085]

According to the present invention, it is possible to provide a digital broadcast receiver which makes it easy to determine the receiving medium being viewed. Also, it is possible to provide a digital broadcast receiver that presents the operation status of the receiver at the time of the reservation execution operation in an easily understandable manner. Further, it is possible to provide a digital broadcast receiver that presents the received information transmitted by digital broadcast and the operation status of the receiver in an easily understandable manner.

Further, by combining these, it is possible to provide a digital broadcast receiver whose operation status is very easy to understand.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of a digital broadcast receiver according to the present invention.

FIG. 2 is a block diagram of a first embodiment of a digital broadcast receiver according to the present invention.

FIG. 3 is a block diagram of a receiving unit.

FIG. 4 is a block diagram of a receiving unit.

FIG. 5 is a block diagram of a backlight unit.

FIG. 6 is a block diagram of a second embodiment of the digital broadcast receiver according to the present invention.

FIG. 7 is a block diagram of a third embodiment of the digital broadcast receiver according to the present invention.

FIG. 8 is a block diagram of a digital broadcast receiver according to a fourth embodiment of the present invention.

FIG. 9 is an example of the appearance of a conventional digital broadcast receiver.

FIG. 10 is an example of a reception information display section of a conventional digital broadcast receiver.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Selection operation input part, 2 ... System control part, 3 ... LCD backlight color control part, 4 ... Liquid crystal backlight light emitting part, 5
... Liquid crystal backlight unit, 6 ... Liquid crystal display control unit, 7 ... Liquid crystal display unit, 8, 9, 15 ... Transmission path input, 10, 11, 16
... Receiving unit, 12 ... Video / audio signal selection and processing unit, 1
3 video signal processing / output unit, 14 audio signal processing / output unit, 17, 24 tuner unit, 18, 25 digital demodulation / error correction unit, 19 descrambling unit, 20 transport demultiplexer unit , 21: MPEG video / audio decoder unit, 22: video signal DA converter unit,
23: audio signal DA converter section, 26, 27 ... backlight color control signal input, 28, 29 ... NPN transistor, 30, 31 ... resistor, 32, 33 ... light emitting diode, 34 ... DC power supply, 35 ... ground, 36 ... Reservation information storage unit, 37 ... External device control unit, 38 ... External device control output,
39: external device signal input, 40: external input signal processing unit,
41: video format detection unit, 42: reception information display unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masataka Otsuka 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Digital Media Systems Division, Hitachi, Ltd. (72) Inventor Satoshi Takahashi Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa 292 F-term in Hitachi Digital Media System Division (Reference)

Claims (20)

[Claims] A receiving unit that receives a plurality of broadcasts of different transmission schemes; a selecting unit for selecting one of the plurality of broadcasts received by the receiving unit; and a broadcast selected by the selecting unit. A receiver for changing a display color in accordance with the display. 2. A receiving section for receiving a plurality of broadcasts of different transmission systems, a program reservation section for setting a program reservation for a broadcast received by the receiving section, and a program reservation state set by the program reservation section. Depending on,
A receiver comprising a display unit for changing a display color. 3. A receiving section for receiving a plurality of broadcasts of different transmission schemes, a separating section for separating an encoded video signal and an audio signal from a signal received by the receiving section, A receiver for changing a display color according to received information based on the encoded video signal and audio signal. 4. A receiving section for receiving a plurality of broadcasts of different transmission schemes, a separating section for separating an encoded video signal and an audio signal from a signal received by the receiving section, A decoding unit that decodes the encoded video signal and audio signal, and a display unit that changes a display color according to decoding information when decoding the video signal and the audio signal encoded by the decoding unit. A receiver comprising: 5. A receiving section for receiving a plurality of broadcasts of different transmission systems, a selecting / processing section for selecting / processing video / audio based on a signal received by the receiving section, and a selecting / processing section. A receiver comprising a display unit for changing a display color according to a format of a video / audio selected and processed by the unit. 6. The display device according to claim 1, wherein the display section has a light emitting section capable of emitting a plurality of colors, and the display color is changed by changing the light emitting color of the light emitting section.
6. The receiver according to any one of claims 5 to 5. 7. A receiver comprising at least two or more broadcast receivers for receiving broadcasts of different transmission methods, one or more of which are digital broadcast receivers for selecting a desired channel. Channel selection operation input means for tuning, a system control unit for performing channel selection control of the broadcast receiving unit by an input from the channel selection operation input means, and an image obtained by channel selection control by the system control unit. A video / audio signal processing unit for processing an audio signal; a display control unit controlled by the system control unit; a display unit controlled by the display control unit; and a backlight color control controlled by the system control unit. A backlight emitting section controlled by the backlight color control section and arranged on the back of the display section, and capable of emitting light of a plurality of colors. Is inputted, the by changing the emission color of the backlight emitting part, a receiver, characterized in that to change the display color of the display unit in response to the broadcast that was tuned by the system controller. 8. A receiver comprising a plurality of broadcast receivers for receiving at least two or more broadcasts of different transmission methods, wherein at least one of the receivers is a digital broadcast receiver, and wherein a desired broadcast program is provided. An input unit for inputting a reservation, a system control unit that fetches input information from the input unit and performs channel selection control at a reservation execution time, a reservation information storage unit that stores reservation information via the system control unit, A video / audio signal processing unit that processes a video / audio signal obtained by tuning control by the system control unit; a display control unit controlled by the system control unit; and a display unit controlled by the display control unit. A backlight color control unit controlled by the system control unit; and a backlight that is controlled by the backlight color control unit and is arranged on the back of the display unit and that can emit light of a plurality of colors. A light emission unit for the backlight, wherein the color of light emitted from the backlight emission unit is changed between when the reservation is executed and when the reservation is not executed according to the reservation execution status instructed by the system control unit. A receiver for presenting a reservation execution status. 9. The receiver according to claim 8, further comprising an external device control unit controlled by the system control unit, wherein the external device control unit is instructed by the system control unit when executing a reservation. Wherein the receiver controls an external device. 10. The receiver according to claim 8, wherein the input unit also serves as a channel selection operation input unit for selecting a desired channel, and the system control unit includes the input unit. The channel control of the broadcast receiving unit is also performed by an input from the means, and the system control unit changes the emission color of the backlight light emitting unit according to the selected broadcast in addition to the reservation execution process. Thus, the operation status of the receiver is presented by the display color of the display unit. 11. The receiver according to claim 10, wherein when the channel selection and the reservation execution process occur simultaneously,
A receiver wherein the backlight control of the system control unit is set so as to give priority to the reservation execution status. 12. The receiver according to claim 10, wherein when a channel selection operation occurs during the reservation execution processing, the system control unit controls the backlight by a channel selection operation for a predetermined time. Priority, and after a certain time,
A receiver for returning to control of a reservation execution state. 13. A receiver comprising at least two or more broadcast receivers for receiving broadcasts of different transmission methods, at least one of which is a digital broadcast receiver, wherein the digital broadcast receiver is a digital broadcast receiver. Is a tuner section for receiving a broadcast of a transmission method, a demodulation / error correction section for digitally demodulating an output signal from the tuner section, and correcting an error, and encrypting / decrypting an output signal from the demodulation / error correction section. A descrambler for processing, a demultiplexer for demultiplexing an output signal from the descrambler and separating it into an encoded video signal and an audio signal, and converting the encoded video signal and the audio signal. A decoder section for decoding, a video DA converter section for receiving the decoded video signal and audio signal, and converting each digital signal into an analog signal; A system control unit having an A-converter unit and performing channel selection control of the digital broadcast receiving unit; a display control unit controlled by the system control unit; a display unit controlled by the display control unit; A backlight color control unit controlled by a control unit; a backlight light emitting unit that is controlled by the backlight color control unit and is arranged on the back of the display unit, and that can emit light of a plurality of colors; The system control unit that controls
Changing the display color of the display unit by extracting decoded information of the encoded video signal and audio signal from the decoder unit and changing the emission color of the backlight emission unit according to the extracted information. A receiver characterized in that: 14. The receiver according to claim 13, wherein a system control unit that controls the digital broadcast receiving unit includes:
A receiver, wherein reception information is extracted from the demultiplexer unit, and a display color of the display unit is changed by changing a light emission color of the backlight light emission unit according to the extracted information. 15. The receiver according to claim 13, wherein a system control unit that controls the digital broadcast receiving unit includes:
The decoded information of the video / audio signal encoded by the decoder unit, the reception information is extracted from the demultiplexer unit, and the emission color of the backlight emission unit is changed according to the extracted information. A receiver, wherein a display color of the display unit is changed. 16. The receiver according to claim 7, wherein the receiver has the digital broadcast receiving unit according to claim 13, and receives the encoded video signal and audio signal. A receiver, wherein the display color of the display unit is changed by changing the emission color of the backlight emission unit according to the decoding information. 17. The receiver according to claim 7, wherein the receiver has the digital broadcast receiving unit according to claim 14, and receives the received information extracted from the demultiplexer unit. A receiver characterized in that the display color of the display unit is changed by changing the light emission color of the backlight light emitting unit in response. 18. The receiver according to claim 7, wherein the receiver includes the digital broadcast receiving unit according to claim 14, and decodes an encoded video signal and an audio signal. A receiver, wherein the display color of the display unit is changed by changing a light emission color of the backlight light emitting unit according to information and reception information extracted from the demultiplexer unit. 19. The receiver according to claim 7, wherein an external device signal input unit for receiving a signal from an external device, an input signal from the external device signal input unit is processed, and the video / audio signal is processed. An external input signal processing unit that outputs a signal to a processing unit; a video format detection unit that detects a format of a video signal or an audio signal from the video / audio signal processing unit and transmits the format to the system control unit; The unit, by changing the emission color of the backlight light emitting unit according to the video format,
A receiver, wherein a display color of the display unit is changed. 20. The receiver according to claim 7, wherein the receiver includes the video format detection unit according to claim 19, and emits the backlight according to the video format. A receiver characterized by changing a display color of the display unit by changing a light emission color of the unit.