JP2016116081A - Electronic apparatus and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus and display method, for effectively displaying video having high image quality.SOLUTION: A transmitter according to an embodiment comprises: a reception unit that comprises at least one tuner and receives a first video signal and a second video signal to be used for making the first video signal's image quality be higher; a decoding unit that is capable of generating first video having a first resolution by decoding the first video signal, is capable of generating second video having a second resolution whose image quality is higher than the first video having the first resolution by decoding the first and second video signals, and outputs either of the first video and second video; and a control unit that displays the second video in the case that the magnitude of a resolution of an area in which the first video or second video is to be displayed is larger than a threshold, and displays the first video in the case that the magnitude of the resolution of the area in which the first video or second video is to be displayed is smaller than the threshold.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an electronic device and a display method.

  In recent years, the introduction of so-called 4K broadcasting (3840 × 2160) and 8K broadcasting (7680 × 4320), which has a resolution four times or eight times the horizontal and vertical resolution of current HD (High Definition) (2K) broadcasting, has been introduced in Japan. It is also being considered for satellite broadcasting.

  However, if 4K broadcasting or 8K broadcasting is to be introduced while maintaining the current broadcasting, it is necessary to newly secure a large capacity broadcasting band. Further, when the current broadcaster provides a 4K / 8K broadcast service, the video resolution and the encoding method are different, so there is a concern that the burden of program production / service operation costs will increase.

  Therefore, for example, the second edition of the HEVC (High Efficiency Video Coding) standard (ISO / IEC23008-2), which is the latest video coding standard standardized in July 2014 by the Moving Picture Experts group (MPEG) Application of SHVC (Scalable High Efficiency Video Coding) (scalable HEVC), which is specified in the above, is being studied. Specifically, based on the MPEG-2 Video video encoding system for HD signals, this decoded image is also an SHVC system that is expanded and used for HEVC encoding of 4K / 8K signals as reference images.

  When adding, expanding, and introducing such new services, there is a concern that some of the existing receivers may cause unexpected operations, and it is necessary to introduce additional expansion services while complying with the current broadcast specifications. Can be difficult.

  In addition, when receiving and reproducing a signal by SHVC or the like in a receiver compatible with 4K / 8K broadcasting, a main channel (current broadcast signal (reference video signal)) and a sub channel (extended broadcast signal (extended video signal)) are set. Since real-time processing is performed in parallel, the processing load to generate high-quality video from the receiver main channel and sub-channel is high, power consumption increases, and high-quality video is displayed after channel switching. A delay time may occur.

JP-A-10-70725

  An object of one embodiment of the present invention is to provide an electronic device and a display method for effectively displaying a high-quality video.

  The electronic device according to the present embodiment includes at least one tuner, and receives a first video signal and a second video signal used to improve the image quality of the first video signal; The first video signal can be decoded to generate a first video having a first resolution, and the first video signal and the second video signal can be decoded to obtain the first video having the first resolution. Can generate a second video having a high resolution and a second resolution, and displays a decoding unit that outputs one of the first video and the second video, and the first video or the second video. When the resolution of the area is larger than the threshold, the second video is displayed, and when the resolution of the area where the first video or the second video is displayed is equal to or smaller than the threshold, And a control unit that displays one video.

FIG. 1 is a schematic diagram illustrating an example of a transmission / reception system 1 according to the first embodiment. FIG. 2 is a block diagram illustrating an example of the receiver according to the first embodiment. FIG. 3 is a block diagram illustrating an example of a decoding processing unit provided in the signal processing unit of the receiver. FIG. 4 is a flowchart illustrating the operation of the receiver according to the first embodiment. FIG. 5A is a diagram illustrating an example of displaying a sub-video. FIG. 5B is a diagram illustrating an example of channel selection of the sub video in the case of FIG. 5A. FIG. 6A is a diagram illustrating an example of displaying a thumbnail video. FIG. 6B is a diagram illustrating an example of selecting a thumbnail video in the case of FIG. 6A. FIG. 7 is a diagram illustrating an example of channel selection when a plurality of screens are displayed. FIG. 8 is a diagram illustrating an example of channel selection of thumbnail images displayed in the recording list. FIG. 9 is a diagram illustrating an example of selecting a thumbnail video displayed on the editing screen. FIG. 10 is a block diagram illustrating an example of a receiver according to the first modification of the first embodiment. FIG. 11 is a flowchart illustrating the operation of the receiver 5 according to the first modification of the first embodiment. FIG. 12 is a block diagram illustrating an example of a receiver according to the second embodiment. FIG. 13 is a flowchart illustrating the operation of the receiver 5 according to the second embodiment. FIG. 14A is a diagram illustrating an example of a prediction channel during zapping, and FIG. 14B is a diagram illustrating an example of a prediction channel during zapping. FIG. 15A is a diagram illustrating an example of a prediction channel during zapping, and FIG. 15B is a diagram illustrating an example of a prediction channel during zapping. FIG. 16 is a flowchart illustrating the operation of the receiver 5 according to the second modification of the second embodiment. FIG. 17 is a diagram illustrating an example of a display switching setting screen according to the second modification of the second embodiment. FIG. 18 is a diagram illustrating an example of a setting screen on which display switching can be set for each item. FIG. 19 is a block diagram illustrating an example of a receiver according to the third embodiment. FIG. 20 is a flowchart illustrating the operation of the receiver according to the third embodiment. FIG. 21 is a block diagram illustrating an example of a receiver according to the fourth embodiment. FIG. 22 is an example of a display setting screen for high-quality video according to the fourth embodiment. FIG. 23A is an example of a display setting screen for high-quality video according to the fourth embodiment, and FIG. 23B is an example of a display setting screen for high-quality video according to the fourth embodiment. FIG. 24A is an example of a display setting screen for high-quality video according to the fourth embodiment, and FIG. 24B is an example of a display setting screen for high-quality video according to the fourth embodiment. FIG. 25 is a flowchart illustrating the operation of the receiver according to the fourth embodiment. FIG. 26 is a block diagram illustrating an example of a receiver according to the fifth embodiment. FIG. 27 is a flowchart illustrating the operation of the receiver 5 according to the fifth embodiment. FIG. 28 is a schematic diagram illustrating an example of a transmission / reception system 1 according to a modification. FIG. 29 is a diagram illustrating an example of displaying a thumbnail video of a modified example.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic diagram illustrating an example of a transmission / reception system 1 according to the first embodiment.
The transmission / reception system 1 according to the present embodiment includes a transmitter (transmission device) 3 and a receiver (reception device, electronic device) 5. In the transmission / reception system 1, the transmitter 3 and the receiver 5 are connected by wired and / or wireless broadcast and communication transmission paths, respectively. In the transmission / reception system 1, the transmitter 3 distributes program content using, for example, a broadcast wave or an IP network as a medium.

  The transmitter 3 attaches various information to the input base video (base video signal) to provide content (TV program (broadcast program), satellite broadcast program, distribution content, video, image, music, program, etc.). Generate and send as a video signal. The base video is a high-quality video (first high-quality video signal) captured by an imaging device, for example, a camera. The high-quality video is, for example, 4K (horizontal resolution 3840 / vertical resolution 2160 (or 1440), frame rate (video frequency) 60 Hz), or 8K (horizontal resolution 7680 / vertical resolution 4320, frame rate 120 Hz). ) It is a video with higher image quality than a video of 2K (the number of pixels in the horizontal direction is 1920, the number of pixels in the vertical direction is 1080, and the frame rate is 60 Hz). The transmitter 3 is configured by applying an SHVC (Scalable High Efficiency Video Coding) encoding method to HD (High Definition) broadcasting. As shown in FIG. 1, in SHVC broadcasting, the transmitter 3 converts content into a plurality of signals, and transmits the plurality of signals through different transmission paths included in the transmission path 101. The transmission line 101 may be any one or more transmission lines for transmitting a signal, such as a broadcast wave band or an IP network line.

  The transmitter 3 includes a reference video signal (first video signal) obtained by down-converting and encoding a high-quality video that is a base video, and an extended video signal (second video) that is encoded with reference to the reference video signal. Signal). The transmitter 3 outputs the reference video signal and the extended video signal converted by a predetermined conversion method to any one of the transmission paths included in the transmission path 101. The reference video signal is a signal constituting the content (reference video (first video)), and may be, for example, a video signal encoded by MPEG2 broadcast on the current digital terrestrial broadcast wave, It may be a video signal different from the video signal broadcast on the current digital terrestrial broadcast wave. The extended video signal is used to improve the image quality of the reference video signal. The extended video signal is a signal for expanding the standard video to a high-quality video (high-quality video (second video)) by referring to the corresponding standard video signal. For example, the transmitter 3 outputs the reference video signal and the extended video signal through different transmission paths. The transmitter 3 transmits signals output to the respective transmission paths by different transmission methods corresponding to the respective conversion methods. The transmission method is various means (forms) related to signal transmission including a broadcasting method, an encoding method, a transmission route, a transmission method, a transmission band, and a line type. For example, the transmitter 3 generates a reference video signal using an MPEG-2 encoding encoder, and generates an extended video signal using an SHVC encoding (scalable encoding) encoder. In the SHVC encoding method, the SHVC encoder 44 can execute any one of inter prediction (motion compensation prediction), intra prediction (intra-screen prediction), and inter-layer prediction (inter-image prediction) for generating a predicted image.

  For example, the transmitter 3 generates a reference video (image) signal (HD (2K) video signal (first video signal)) and an extended video signal (complementary video of HD video for 4K video) from the input base video. A second video signal)). The transmitter 3 transmits (transmits) the reference video signal and the extended video signal using different transmission paths and / or transmission methods.

  The reference video signal output from the transmitter 3 includes PSI / SI (first PSI / SI), ECM (Entitlement Control Message) / EMM (Entitlement Management Message) (first ECM / EMM), time information, and the like. It has. The extended video signal includes PSI / SI (second PSI / SI), ECM / EMM (second ECM / EMM), time information, and the like. Here, the first PSI / SI and the second PSI / SI are information related to the same content (or base video). Note that the second PSI / SI includes a descriptor (first channel selection control information) for enabling reference to ESs of signals transmitted in different transmission paths and / or different transmission schemes in the PMT. You may go out. The second PSI / SI may include, for example, a descriptor (second channel selection control information) that newly associates a reference video signal and an extended video signal with the NIT. The second channel selection control information enables identification of signals transmitted by different transmission paths and different transmission schemes, and allows reference to signals transmitted by different transmission paths and different transmission schemes.

Here, the ECM is common information including information related to the control of the receiver 5, and the EMM is individual information including information for decrypting the personal contract information and the common information.
PSI and SI include PAT (Program Association Table), PMT (Program Map Table), NIT (Network Information Table), CAT (Conditional Access Table), and the like. PAT is information for managing programs included in a stream. The PMT is information for managing data such as audio / video (A / V) constituting the content (program, program). NIT is information for managing network-related settings, and includes information related to a transmitting network such as a channel number, a modulation scheme, and a guard interval. CAT is management information for pay broadcasting. For convenience of explanation below, SI may be expressed as PSI as a part of PSI.

  The time information includes, for example, PTS (Presentation Time Stamp), DTS (Decoding Time Stamp), system time reference value (System Time Clock: STC), SCR (System Clock Reference), and the like.

  The receiver 5 receives content distributed from the transmitter 3 by satellite and / or terrestrial (digital terrestrial broadcasting) broadcasting, and displays the received content. Of the contents received and displayed by the receiver 5, the video as the main channel and the display signal (first display signal) of the video are broadcast signal, main channel, main service, main channel TS (Transport Stream). The main video signal, HD video signal, HD broadcast signal, 2K video signal current service, current broadcast signal, etc., and the sub-channel video and the video display signal (second display signal) are sub-channel, It may be referred to as a sub service, a sub channel TS, a high quality video signal, a 4K video signal, a 4K broadcast signal, an extended service, and an extended broadcast signal. Hereinafter, a channel provided in a remote controller (remote controller) or the like for displaying contents and program signals in the receiver 5 is simply referred to as a channel unless otherwise specified.

  The receiver 5 is, for example, a television (TV), a personal computer (PC), a home server, and a recorder. In the present embodiment, the receiver 5 is a 2K (2K1K), 4K (4K2K), and / or 8K (8K4K) compatible TV. Hereinafter, for convenience of explanation, the receiver 5 is described as a 2K / 4K compatible TV.

Hereinafter, the receiver 5 will be described in detail with reference to the drawings.
FIG. 2 is a block diagram illustrating an example of the receiver 5 according to the first embodiment.
The receiver 5 of this embodiment includes an antenna unit 104, an external input terminal 105, an input unit 111, a signal processing unit 112, a system controller (system control unit (control unit)) 113, and a video processing unit 114. , Display unit 115, audio processing unit 116, audio output unit 117, operation unit 119, reception unit 120, communication interface 121, network control unit 122, USB (Universal Serial Bus) interface 123, HDMI (High-Definition Multimedia Interface) (registered trademark) 124, RAM (Random Access Memory) 125, NVM (Non-Volatile Memory) 127, and storage unit 129.

The antenna unit 104 receives a broadcast wave or the like and outputs it to the input unit 111. For example, the antenna unit 104 receives a reference video signal and an extended video signal transmitted through the transmission path 101 as a broadcast wave, and outputs them to the input unit 111.
The external input terminal 105 is a terminal for connecting to a dedicated line, a terminal device, and / or an external device.

  The input unit 111 includes an antenna that receives a broadcast and a tuner that selects a received signal. The input unit 111 includes a plurality of tuners, for example, eight tuners corresponding to digital terrestrial broadcast signals, BS (Broadcasting satellite) broadcast signals, CS (Communications satellite) signal broadcasts, and the like, as shown in FIG. . The input unit 111 is connected to an antenna and receives a program or the like supplied by a broadcaster through a broadcast line and / or a spatial wave. For example, when the input unit 111 includes a plurality of tuners, the input unit 111 receives at least one tuner a signal constituting the program. In addition, the input unit 111 receives content (such as a program) supplied via a transmission path and a network. The input unit 111 receives a broadcast stream (broadcast signal and extended broadcast signal), selects one or a plurality of program broadcasts, and sets it as a broadcast stream that can be used by the signal processing unit 112. The input unit 111 transmits all the received content (programs and the like) of the predetermined number of channels to the signal processing unit 112. The input unit 111 can also acquire a signal from the external input terminal 105.

  The signal processing unit 112 includes a decoding processing unit 221. The signal processing unit 112 separates the program supplementary information multiplexed in the received broadcast signal, outputs the separated program supplementary information to the video processing unit 114, and outputs the recording stream to the system controller 113. The recording stream is information obtained by separating the program supplementary information from the broadcast stream received by the input unit 111 in the signal processing unit 112. The signal processing unit 112 displays a broadcast signal (broadcast signal and extended broadcast signal) acquired from the input unit 111 as a video signal (video) (first TS signal and second TS signal) and an audio signal (audio). Separated into control information. Further, the signal processing unit 112 performs a restoration process (decoding process) on the first TS signal and the second TS signal by the decoding processing unit 221. The signal processing unit 112 outputs the audio signal to the audio processing unit 116. Note that the signal processing unit 112 may include a plurality of decoding processing units 221. Details of the decoding processing unit 221 will be described later.

  A system controller (system control unit) 113 controls the operation of each unit of the receiver 5. That is, the system controller 113 includes an input unit 111, a signal processing unit 112, a video processing unit 114, a display unit 115, an audio processing unit 116, an audio output unit 117, a DMS unit 118, an operation unit 119, a receiving unit 120, a communication interface ( I / F) 121, network control unit 122, USB interface (I / F) 123, HDMI 124, storage unit 129, and the like. The system controller 113 is connected to each unit of a decoding processing unit 221 of the signal processing unit 112 described later, and controls the processing of the decoding processing unit 221.

  The system controller 113 receives input signals (operation instruction signals) from a remote control terminal (remote controller (remote controller)) 302, a keyboard 306, and a portable terminal such as a smartphone, a mobile phone, a tablet, and a notebook PC received by the receiving unit 120. Various control commands corresponding to) are output. Here, the control command is a command for instructing, for example, recording of a television method (program), reproduction of recorded content (program), and the like.

The system controller 113 includes a CPU 132, a decryption control unit 133, and a ROM (Read Only Memory) 138.
The CPU 132 is a main processor that controls operations. The CPU 132 can read and execute setting information included in the ROM 138, the NVM 127, and the like. Further, the CPU 132 controls each part of the system controller 113 in response to an instruction from a circuit or the like included in the system controller 113 described later. The CPU 132 receives the operation information from the operation unit 119 provided in the main body of the receiver 5 or the operation information transmitted from the remote controller 302 and received by the reception unit 120, thereby reflecting the operation contents of the operation information. Each part of the receiving device 5 is controlled so as to be as follows.

  The decoding control unit 133 controls decoding processing by at least two demultiplexing units and a decoder. In the present embodiment, the decoding control unit 133 controls the decoding process of at least one decoding processing unit 221. The decoding control unit 133 performs control of operation of the decoding processing unit 221 and control of power supply in accordance with an instruction from the CPU 132. Further, the decoding control unit 133 can receive signals directly from each unit of the receiver 5 other than the CPU 132 and execute control of the decoding processing unit 221. For example, the decoding processing unit 221 may control only the decoding process in the second signal processing unit 602 described later. The decoding control unit 133 is an electronic circuit or the like. Note that the decoding control unit 133 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.

A ROM (read only memory) 138 holds a control program executed by the system controller 113 (CPU 132).
The video processing unit 114 decodes the video signal (the first display signal and / or the second display signal) acquired from the signal processing unit 112, and has a predetermined resolution and a display that can display the decoded video signal on the display unit 115. Convert to output method. The video processing unit 114 receives the signal output from the system controller 113 and generates an OSD (On Screen Display) signal. For example, the video processing unit 114 generates an integrated program guide display signal as an OSD signal. The video processing unit 114 combines (multiplexes) the OSD signal and the converted video signal, and outputs a combined video signal of the OSD signal and the converted video signal to the display unit 115. The video processing unit 114 may output the above-described composite video signal to an output terminal of an external monitor device or a projection device (projector device) connected as an external device.

  The display unit 115 displays the composite video signal from the video processing unit 114 as a video. When the receiving unit 120 receives an operation signal from the remote control 302 or another portable terminal, the display unit 115 displays an image according to the operation signal. Further, even when an operation signal from the keyboard 306 is output via the USB interface 123, the display unit 115 can display an image in accordance with the operation signal from the keyboard 306. Hereinafter, a video generated by encoding the reference video signal may be referred to as a reference video, and a video generated by encoding the reference video signal and the extended video signal may be referred to as a high-quality video.

  The audio processing unit 116 decodes the audio / acoustic signal (audio) of the program received by the input unit 111 and outputs it to the audio output unit 117.

The operation unit 119 inputs a control command corresponding to a direct operation by the user to the system controller 113.
The receiving unit 120 inputs a control command corresponding to an input signal from an external terminal such as the remote control 302 and a portable terminal to the system controller 113.

  The communication interface 121 realizes wireless communication with a short-range wireless communication device compliant with, for example, the WiFi (Wireless Fidelity) standard. As the short-range wireless communication standard, for example, Bluetooth (registered trademark) standard, NFC (Near Field Communication), or the like can be used. The communication interface 121 may be either a wired system or a wireless system. For example, a communication unit that can transmit and receive signals to and from a wireless keyboard, a mouse, and the like is connected. The communication interface 121 can also communicate with, for example, a card reader (reading unit) 304 that can communicate with a non-contact card medium.

  The network control unit 122 controls access to an external network, for example, the Internet (IP network). The network control unit 122 transmits and receives information on the Internet (IP network). For example, the network control unit 122 can also receive extended video information via an IP network. In this case, the network control unit 122 inputs the extended video signal to the input unit 111 in accordance with the instruction signal from the CPU 132. Note that the network control unit 122 may receive the reference video signal and / or the extended video signal and output it to the input unit 111.

The USB interface 123 is connected to, for example, an external device that conforms to the USB standard, such as a keyboard 306.
The HDMI 124 enables wired communication between a plurality of devices that use the HDMI standard or the MHL (Mobile High-definition Link) standard.

A RAM (random access memory (work memory)) 125 provides a work area to the system controller 113 (CPU 132).
The NVM (nonvolatile memory) 127 holds various setting information and control information of the receiver 5. Further, the nonvolatile memory 127 can also hold program table construction content information. For example, the non-volatile memory 127 includes setting information for various display screens.

  For example, the nonvolatile memory 127 may include a threshold value (display threshold value) of the resolution size of the display area of the display video. The display threshold is information that is referred to when the decoding control unit 133 controls the decoding processing unit 221. The reference resolution may be a resolution smaller than the resolution of 4K or 8K video, or 1/4 resolution of 4K video.

  In addition, the nonvolatile memory 127 may include information on the reference resolution (for example, the resolution of the display video before switching) in the setting information. Here, the reference resolution may be arbitrarily set by the user or may be set in advance. Further, the reference resolution may be the resolution of the currently displayed display image, or the resolution of the highest quality image that the receiver 5 supports. For example, the reference resolution may be 4K or 8K video resolution, or 1/4 resolution of 4K video. The reference resolution may be recorded on another recording medium, or may be held in the ROM 138 or the like.

  The display screen setting information is information such as the resolution (display resolution) or the size of the display screen when various images such as sub-images, two-screen displays, and thumbnail images are displayed on the screen of the display unit 115. Note that the display screen setting information may be recorded on another recording medium, or may be stored in the ROM 138 or the like.

  The setting information also includes information (determination information) used to determine which of the reference video (low quality video) and the high quality video (extended video) is to be displayed. In this case, the information included in the determination information may be set for each type of high-quality video (4K resolution or 8K resolution), or may be arbitrarily set by the user via the remote control 302 or the like. It may be set in advance at the manufacturing stage. The determination information used to determine which of the reference video and the high-quality video is displayed is displayed for each video display mode (for example, cloud menu, sub-video, multi-screen display, thumbnail video display, etc.). It may be information indicating whether the video to be processed is a reference video or a high-quality video, or may be a threshold value (display threshold value) of the size (resolution) of the area for displaying the video image.

  The storage unit 129 is, for example, an HDD (Hard Disk Drive), and records various setting information of the receiver 5, received content, video displayed on the display unit 115, and the like. Note that the storage unit 129 may be connected via the USB interface 123 as an external device.

Next, the configuration of the decoding processing unit 221 will be described below with reference to the drawings.
FIG. 3 is a block diagram illustrating an example of the decoding processing unit 221 included in the signal processing unit 112 of the receiver 5.
The decoding processing unit 221 performs decoding processing on the broadcast signal selected by the input unit 111 to restore the video signal, the audio signal, the caption / text super information, and the program related information. The decoding processing unit 221 also includes a processing system for audio signals and various types of information (signals), but is not shown for simplicity. In FIG. 3, two types of lines are shown, but the double line indicates the input / output of a content signal, for example, a signal including a video signal, and the solid line does not include a control video signal, for example, control Signal input and output including signal and information (signal) is shown. In the first signal processing unit 601 and the second signal processing unit 602, the system time reference value (System Time Clock: STC) is common.

  The decoding processing unit 221 includes a plurality of input terminals and a transmission line composite unit for inputting various signals. In the present embodiment, the decoding processing unit 221 includes input terminals 60 and 80, transmission path decoding units 62 and 82, a clock recovery control unit 72, an up converter 74, a buffer 76, an output selector (channel selection unit) 96, , An output terminal 97, a first signal processing unit 601, and a second signal processing unit 602. Note that the decoding processing unit 221 is controlled by the CPU 132 at each unit. That is, the CPU 132 controls the clock regeneration control unit 72, the upconverter 74, the buffer 76, the output selector 96, the first signal processing unit 601, the second signal processing unit 602, and the like.

  In the present embodiment, the input terminal 60 receives a broadcast signal and outputs it to the transmission path decoding unit 62. The input terminal 80 receives the extended broadcast signal and outputs it to the transmission path decoding unit 82. The transmission path decoding units 62 and 82 demodulate the input broadcast signal, and the decoding process corresponding to the transmission path is canceled by the transmission path decoding process. The transmission path decoding units 62 and 82 output the decoded signals (first TS signal and second TS signal).

  The clock recovery control unit 72 generates second clock information for synchronizing the decoding timing, and outputs the time information acquired from the second demultiplexing unit 84. Further, since the clock regeneration control unit 72 has a common STC, the decoder 68 and the SHVC decoder 78 can be synchronously controlled based on the PCR.

The up-converter 74 up-converts the resolution, screen size, and color band of the input video signal. The up-converter 74 up-converts the video signal (second decoded video signal) decoded by the decoder 68, generates a video signal (second enlarged decoded video) signal generated by the up-conversion, and generates the second signal. The expanded decoded video is output. For example, the up-converter 74 converts the resolution of the input 2K video signal to the resolution of the 4K video signal (second enlarged 4K video signal).
The buffer 76 is a storage area circuit for temporarily storing various signals.

  The output selector 96 selects an image included in the input video signal based on the time information at a predetermined display timing, arranges the images in order in time series, and outputs the video as a video. Note that the output selector 96 can output the information (signal) including the audio and the program guide in association with the video to be output. The output selector 96 outputs the selected video signal (selected video signal) and selection information for identifying the selected video signal. In the receiver 5, the output selected video signal is displayed on the display unit 115 via the video processing unit 114. The output selector 96 can also select and output a video signal in accordance with signals (instruction signals) from the PSI / SI processing unit 90 and the CPU 132.

  In this embodiment, the output selector 96 can select a signal to be output to the main channel and the sub-channel and output it as a selection signal (selected video signal) only with the second PSI / SI information of the extended video signal. it can. In this case, the output selector 96 can select and output ESs (component streams) included in different TSs according to instruction signals from the PSI / SI processing unit 90 and the CPU 132 described later. For example, the output selector 96 can insert an image included in a video output on the main channel into a video to be displayed as a subchannel, for example, a 4K video signal. The output selector 96 can also output audio output on the main channel so as to correspond to 4K video displayed as a subchannel.

  The first signal processing unit 601 receives the first TS signal from the input terminal 60 and decodes the first TS signal into a main channel video signal (first display signal). The second signal processing unit 602 receives the second TS signal from the input terminal 80 and decodes the second TS signal into a sub-channel video signal (second display signal). For example, the first signal processing unit 601 decodes the first TS signal into a 2K video signal, and the second signal processing unit 602 includes, for example, the first TS signal (2K video signal) and the second TS. The signal (extended video signal of 4K broadcast video) is decoded into a second high-quality video signal (4K video signal). Note that the first signal processing unit 601 has substantially the same configuration as a receiver that supports current TV broadcasting, for example, HD broadcasting. That is, even if the current receiver, for example, a TV receiver is applied to the transmission / reception system 1 of this embodiment, it can receive and display an HD (2K) broadcast signal.

The configurations of the first signal processing unit 601 and the second signal processing unit 602 will be described.
First, the first signal processing unit 601 will be described below.
The first signal processing unit 601 includes a first demultiplexing unit 64, a first descrambler 66, a first ECM / EMM processing unit 70, and a decoder 68.

  The first demultiplexing unit 64 separates the input signal into various information (signals) and a video signal, and outputs the separated various signals. The first demultiplexing unit 64 includes a PID filter (first PID filter) 641 that captures only signals that satisfy the set filter condition. The first demultiplexing unit 64 can set the value of the PID filter 641 in accordance with the instruction signal from the CPU 132. The first demultiplexing unit 64 takes out the PAT, takes out the PID of the PMT of the content designated by the operation signal, takes out the PMT designated by this PID, and takes out the video signal designated by this PMT. The extracted video signal and time information signal are output.

  The first descrambler 66 performs a decryption process on the input signal. For example, the first descrambler 66 cancels various signals encrypted with the scramble key. The first descrambler 66 executes, for example, a decryption process of MULTI1.

  The first ECM / EMM processing unit 70 performs processing to extract a scramble key from the ECM and EMM from the input signal. The first ECM / EMM processing unit 70 decrypts the encrypted EMM with a unique key related to the receiver 5 and extracts a work key from the decrypted EMM. Next, the first ECM / EMM processing unit 70 decrypts the ECM using the work key, and extracts the scramble key from the decrypted ECM. The first ECM / EMM processing unit 70 outputs information on the extracted scramble key.

  The decoder 68 unpacks the input signal and performs a decoding process on the unpacked signal. The decoder 68 decodes the encoded signal and outputs a decoded reference video (with resolution) signal. Hereinafter, the resolution of the reference image may be referred to as a first resolution. For example, the decoder 68 decodes a signal encoded in the MPEG-2 encoding format and outputs a decoded 2K video signal. The reference video signal may be simply referred to as a reference video.

Next, the second signal processing unit 602 will be described below.
The second signal processing unit 602 includes a second demultiplexing unit 84, a second ECM / EMM processing unit 86, a second descrambler 88, a PSI / SI processing unit 90, and an SHVC decoder 78. , A metadata processing unit 92 and an image quality improvement processing unit 94 are provided.

  The second demultiplexing unit 84 separates the input signal into various information (signals) and a video signal, and outputs the separated various signals. The second demultiplexing unit 84 outputs time information included in the input signal to the clock recovery control unit. The second demultiplexing unit 84 includes a PID filter (second PID filter) 642 that takes in only signals that satisfy the set filter condition. The second demultiplexing unit 84 can set the value of the PID filter 642 according to the instruction signal from the CPU 132. The second demultiplexing unit 84 takes out the PAT from the PSI, takes out the PMT PID of the content designated by the operation signal or the like, takes out the PMT designated by this PID, and extracts the video signal designated by this PMT. The extracted video signal and time information signal are output. When the second demultiplexing unit 84 extracts an invalid PID value (0x1FFF) for elementary_PID in the data structure of the PMT, the second demultiplexing unit 84 identifies the component designation in the signal of a different transmission path and transmission method. , Output identification information.

  The second ECM / EMM processing unit 86 performs processing for extracting a scramble key from the ECM and EMM from the input signal. The first ECM / EMM processing unit 70 decrypts the encrypted EMM with a unique key related to the receiver 5 and extracts a work key from the decrypted EMM. Next, the first ECM / EMM processing unit 70 decrypts the ECM using the work key, and extracts the scramble key from the decrypted ECM. The first ECM / EMM processing unit 70 outputs information on the extracted scramble key.

  The second descrambler 88 executes decryption processing on the input signal. For example, the second descrambler 88 cancels each of the various signals encrypted with the scramble key. The second descrambler 88 executes, for example, AES decryption processing.

  The PSI / SI processing unit 90 processes program specifying information (PSI) and service information (SI) according to an instruction signal from the CPU 132, and outputs information (signals) related to PSI and SI. The PSI / SI processing unit 90 transmits and receives signals to and from the first demultiplexing unit 64, the second demultiplexing unit 84, and the output selector 96.

  For example, the PSI / SI processing unit 90 reads not only the ES in the same signal by reading the PMT in which the first channel selection control information included in the second PSI / SI is described according to the instruction signal of the CPU 132. Thus, processing equivalent to referring to the PMT included in the PSI in a different signal (TS signal) can be performed, and an ES in a different TS signal can be referred to. That is, the receiver 5 (CPU 132) only refers to the second PSI PMT, and does not refer to the first PSI / SI PMT of the reference video signal (first TS signal). The ES included in the TS signal can be referred to. As a result, the PSI / SI processing unit 90 can extract a necessary ES in accordance with the instruction signal from the CPU 132 only by referring to the second PSI PMT, and can generate a tuning list based on the extracted ES. For example, the PSI / SI processing unit 90 reads the PMT (Service Y) included in the second PSI, thereby performing the same processing (the same as reading the PMT (service X) included in the first PSI). Information or processing as the same service), and the ES included in the first TS signal can be referred to.

In addition, the PSI / SI processing unit 90 reads a descriptor defined in the PMT included in the PSI, and refers to an ES of a signal transmitted using a different transmission path and a different transmission method. The PSI / SI processing unit 90 extracts a necessary ES from signals transmitted by different transmission paths and different transmission methods from the referenced ES. The PSI / SI processor 90 generates a channel selection list (channel selection information) that defines a channel selection procedure including a video signal to be selected from an ES extracted in accordance with an instruction signal from the CPU 132, display timing, and displayable content. . Here, the channel selection list is information for controlling the channel selection procedure (timing) and instructions for a plurality of display signals to be selected.
The PSI / SI processing unit 90 may separately read the first PSI / SI of the reference video signal and the second PSI / SI of the extended video signal.

  Further, the decoding processing unit 221 includes a PSI / SI processing unit (first PSI / SI processing unit) (not shown) for the reference video signal and a PSI / SI processing unit (second PSI processing unit) for the extended video signal. / SI) (not shown) may include a PSI / SI processing unit. In this case, the first PSI / SI processing unit reads the first PSI / SI from the reference video signal in accordance with the instruction signal from the CPU 132, and extracts a necessary ES (first ES). The first PSI / SI processing unit outputs the extracted first ES to the first demultiplexing unit 64 and outputs the tuning list to the output selector 96. Similarly, the second PSI / SI processing unit reads the second PSI / SI from the reference video signal in accordance with the instruction signal from the CPU 132, and extracts a necessary ES (second ES). The second PSI / SI processing unit outputs the extracted second ES to the second demultiplexing unit 84, and outputs the tuning list to the output selector 96. The first PSI / SI processing unit and the second PSI / SI processing unit output the extracted first ES and second ES to the output selector 96, respectively.

  The SHVC decoder 78 unpacks the input signal and executes a decoding process on the unpacked signal. In the present embodiment, the SHVC decoder 78 performs a decoding process on an input scalable encoded (SHVC (MPEG-HEVC Video) encoded) video signal. The SHVC decoder 78 is one of inter prediction (motion compensation prediction), intra prediction (intra-screen prediction), and inter-layer prediction (inter-image prediction) when decoding an extended prediction image corresponding to the SHVC encoding method. Can be executed. The SHVC decoder 78 decodes the scalable signal into the extended prediction video signal in the SHVC encoding format. For example, the SHVC decoder 78 performs inter-layer prediction on the decoded extended predicted video signal and the second extended video signal constituting the second extended video signal (for example, 4K video signal), so ) Signal (secondary high-quality signal) (for example, 4K video signal). Hereinafter, the resolution of the high-quality video may be referred to as the second resolution. The SHVC decoder 78 outputs the generated high quality video signal. The SHVC encoder 44 can also generate a high-quality video signal by a prediction method other than inter-layer prediction. In some cases, the high-quality video signal is simply referred to as a high-quality video.

  The metadata processing unit 92 generates grading information for grading, such as contrast, color band, gradation characteristics, and the like for improving the image quality from the metadata, and outputs the generated grating information. The metadata processing unit 92 generates grating information related to high-quality video, for example, 4K video.

  The image quality improvement processing unit 94 increases the image quality by grating the video signal input according to the grating information. The high image quality processing unit 94 executes various image processes for creating a high-quality atmosphere image such as brightness, contrast, color band, and filter effect.

FIG. 4 is a flowchart showing the operation of the receiver 5 of this embodiment.
When the receiver 5 is activated, in S401, the CPU 132 detects whether or not an extended video signal (enhancement layer) has been received.

  In S402, the CPU 132 acquires high-quality video, for example, information of 4K resolution (horizontal resolution 3840 / vertical resolution 2160, frame rate 60 Hz). At this time, for example, the CPU 132 uses information used to determine which of the reference video (low-quality video) and the high-quality video (extended video) to display from the setting information stored in the nonvolatile memory 127. read out. This information may be set for each type of high-quality video (4K resolution or 8K resolution), may be arbitrarily set by the user via the remote control 302 or the like, and is set in advance at the manufacturing stage. May be. Information used to determine whether to display standard video or high-quality video should be displayed for each video display format (for example, cloud menu, sub-video, multi-screen display, thumbnail video display, etc.) The video may be information indicating either the reference video or the high-quality video, or may be a threshold value (display threshold value) of the size (resolution) of the area for displaying the video image. In this case, when the form of the display image displayed on the display unit 115 is indicated as the display of the reference image, or when the size of the display area of the image is smaller than the display threshold, the decoding control is performed. The unit 133 controls the decoding processing unit 221 so as to decode only the reference video signal. That is, the receiver 5 displays the reference video on the display unit 115. When the display video form displayed on the display unit 115 is indicated by the reference video display and setting information, or when the video display area has a resolution larger than the display threshold, the decoding control unit 133 displays the reference video. The decoding processing unit 221 is controlled so as to decode the signal and the extended video signal. The receiver 5 displays the high quality video on the display unit 115.

In S403, an operation signal for switching the display video displayed on the display unit 115 is received from the remote controller 302 or the like.
In S <b> 404, when receiving the operation signal for switching the display video, the CPU 132 acquires information on the display form and display type of the display video displayed after the switching.

In S405, the CPU 132 determines whether or not the video displayed in the display form and display type after display switching is larger than the display threshold.
When the display image after the display switching and the display image of the display type are equal to or less than the display threshold (NO in S405), the CPU 132 performs a decoding control unit so as to execute a decoding process corresponding to the preset display form and display type. An instruction signal is output to 133. The decoding control unit 133 receives the instruction signal from the CPU 132 and controls the decoding processing unit 221 so as to decode only the reference video signal.
In S406, the decoding processing unit 221 outputs the reference video. That is, the receiver 5 displays the reference video on the display unit 115.

When the display image after the display switching and the display image of the display type are equal to or less than the display threshold (YES in S405), the CPU 132 performs a decoding control unit so as to execute a decoding process corresponding to the preset display form and display type. An instruction signal is output to 133. The decoding control unit 133 receives the instruction signal from the CPU 132 and controls the decoding processing unit 221 so as to decode the reference video signal and the extended video signal.
In S407, the decoding processing unit 221 outputs a high-quality video. That is, the receiver 5 displays the high-quality video on the display unit 115.

Several examples relating to display switching in the receiver 5 of the present embodiment will be described below with reference to the drawings.
FIG. 5A is a diagram illustrating an example of displaying a sub-video on the display video, and FIG. 5B is a diagram illustrating an example of selecting a sub-video in the case of FIG. 5A. 5A and 5B, the display video G1 is a high-quality video, for example, a 4K video, and the display video G2 is a sub-video displayed on the display video G1. Also, the sub-video is set to be displayed in the setting information at the resolution of 2K video. The display threshold is ¼ the resolution of 4K video (2K video resolution).

  First, in FIG. 5B, a case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the setting information will be described.

  As shown in FIG. 5B, when the operation signal is received from the remote controller 302, when the CPU 132 displays the display video G2 on the display video G1, the sub video is displayed at a resolution of 2K video according to the setting information.

  Next, in FIG. 5B, a case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the threshold value of the setting information will be described.

  As shown in FIG. 5B, when an operation signal is received from the remote control 302, the CPU 132 determines whether the resolution of the display video G2 is larger than the display threshold when displaying the display video G2 on the display video G1. To do. The decryption control unit 133 controls the decryption processing unit 221 in accordance with an operation instruction from the CPU 132. In FIG. 5B, since the size of the resolution of the display video G2 is equal to or less than the display threshold, the decoding control unit 133 decodes the extended video signal according to the instruction signal from the CPU 132, that is, the decoding processing of the second signal processing unit 602. To stop (or skip). For example, the decoding processing unit 221 configures the sub-video with the reference video signal and the 2K video signal in accordance with the current broadcast wave decoding process (for example, decoding process of the MPEG-2 encoded signal). For example, when it is determined that the resolution of the display video after the display switching is equal to or less than the display threshold (1/4 the resolution of the 4K video), the CPU 132 displays the 2K video as the sub video after the display switching. Displayed on the unit 115.

6A is a diagram illustrating an example of displaying a thumbnail video as a display video, and FIG. 6B is a diagram illustrating an example of selecting a thumbnail video in the case of FIG. 6A. In addition, the display threshold is assumed to be 1/4 of the resolution of 4K video, as in FIGS. 5A and 5B.
In FIG. 6A, a display video G3 is a thumbnail video displayed when the d button B1 provided on the remote control 302 is pressed. The thumbnail video is set to be displayed in the setting information at a resolution of 2K video.

  First, in FIG. 6B, a case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the setting information will be described.

  As shown in FIG. 6B, when the operation signal is received from the remote controller 302, when the CPU 132 displays the display video G2 on the display video G1, the thumbnail video is displayed with a resolution of 2K video according to the setting information. .

  Next, in FIG. 6B, a case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the threshold value of the setting information will be described.

  As shown in FIG. 6B, when an operation signal is received from the remote controller 302, the CPU 132 determines whether the resolution size of the display video G3 is equal to or less than the display threshold when displaying the display video G3. The decoding control unit 133 controls the decoding processing unit 221 in accordance with an instruction from the CPU 132. As shown in FIG. 6B, when the resolution of the display video G3 is equal to or smaller than the display threshold, the decoding control unit 133 performs decoding of the extended video signal according to the instruction signal from the CPU 132, that is, the second signal processing unit 602. Stop (or skip) the decoding process. The decoding processing unit 221 configures a thumbnail video with a reference video signal, for example, a 2K video signal, according to, for example, a current broadcast wave decoding process (for example, a decoding process of an MPEG-2 encoded signal). For example, when it is determined that the resolution of the display video after the display switching is equal to or less than the display threshold (1/4 of the resolution of the 4K video), the CPU 132 sets 2K as the thumbnail video after the display switching. The video is displayed on the display unit 115.

In addition to these examples, some examples will be described with reference to FIGS.
FIG. 7 is a diagram illustrating an example of channel selection when a plurality of screens are displayed, FIG. 8 is a diagram illustrating an example of channel selection of thumbnail images displayed in the recording list, and FIG. 9 is an editing screen. It is a figure which shows an example of the channel selection of the thumbnail image displayed on. 7 to 9, the sub video and the thumbnail video are set to be displayed in the setting information at the resolution of 2K video, as in FIGS. 5A to 6B. The display threshold is ¼ the resolution of 4K video (2K video resolution).

First, the case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the setting information will be described with reference to FIGS.
In the examples shown in FIGS. 7 to 9, the sub-video and the thumbnail video are displayed at the resolution of 2K video according to the setting information.

  Next, with reference to FIGS. 7 to 9, a case where the CPU 132 displays a display image corresponding to the display form on the display unit 115 according to the threshold value of the setting information will be described.

  As shown in FIG. 7, when a plurality of screens are displayed, the CPU 132 determines whether each display video (G4, G5) is larger than the display threshold.

As shown in FIG. 8, when thumbnails are displayed in the recording list, as described above,
CPU132 determines whether each display image | video (G6) is larger than a display threshold value.

  As shown in FIG. 9, even when a plurality of thumbnail images are displayed on the editing screen, the resolution comparison unit 134 determines whether each display image (G7, G8) is larger than the display threshold as described above. .

  In the example shown in FIGS. 7 to 9, when it is determined that the resolution of the video displayed in the display area after the display switching is equal to or less than the display threshold, the CPU 132 uses the 2K video as the thumbnail video after the display switching. Is displayed on the display unit 115.

  According to the present embodiment, the receiver 5 stops (or skips) the high-quality video decoding process when the CPU 132 receives a video display request having a resolution size equal to or smaller than the display threshold. For example, when the display threshold is set to 1/4 of the resolution of 4K, the receiver 5 receives the display request for the video of the resolution of 2K and receives the extended video signal and the reference video signal. When a request to display a high-quality video image, for example, a 4K video signal is stopped (or skipped) and a video image having a resolution of 4K is received, the processing to restore the 4K video signal is executed. For this reason, in the receiver 5 of this embodiment, the process which produces | generates a high quality high quality image, for example, 4K image | video with respect to the image below a display threshold is suppressed. As a result, in the receiver 5, the processing time for switching display is shortened. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Furthermore, when high-quality video is decoded from the extended video signal and the reference video signal, various processes are required, and the load and power consumption required for the process can be increased. However, in the receiver 5 of the present embodiment, processing for generating a high-quality video for video less than the reference resolution is suppressed, so the load and power consumption required for these processing are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In the present embodiment, the receiver 5 (CPU 132) outputs the reference video signal when the resolution of the display video displayed at the time of switching the display is less than the reference resolution, but the currently displayed display video. Whether the reference image or the high-quality image is displayed may be determined according to the display area of the display unit 115. For example, when the CPU 132 receives an operation instruction signal for requesting display switching from the remote controller 302, the CPU 132 detects that the display video to be displayed next on the display unit 115 is smaller than the display area of the currently displayed display video. The reference image is displayed on the display unit 115 as a display image.

  In the present embodiment, the receiver 5 can also receive the reference video signal and the extended video signal transmitted from the transmitter 3 via the IP network (Internet) included in the transmission path 101. For example, the receiver 5 may receive a reference video signal as a broadcast wave on a broadcast wave transmission path included in the transmission path 101 and receive an extended video signal via an IP network included in the transmission path 101. .

  Next, a modification of the receiver according to the first embodiment will be described. In the modification of the embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

(Modification 1)
The receiver 5 of the first modification of the first embodiment includes a resolution comparison unit 134 in addition to the configuration of the receiver 5 of the first embodiment.

  FIG. 10 is a block diagram illustrating an example of the receiver 5 according to the first modification of the first embodiment.

  The system controller 113 according to the first modification of the present embodiment further includes a resolution comparison unit 134.

  The resolution comparison unit 134 detects the resolution of the display video when receiving a signal for switching the video (display video) displayed on the display unit 115, and sets a reference resolution (for example, before switching). The resolution size of the display image after the switching is compared with the display image after the switching. The resolution comparison unit 134 outputs the comparison result. The resolution comparison unit 134 is an electronic circuit or the like. The resolution comparison unit 134 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132. Hereinafter, switching of the video displayed on the screen of the display unit 115 is referred to as display switching, and switching of the video of a program to video of another program is referred to as program switching (channel switching).

FIG. 11 is a flowchart showing the operation of the receiver 5 of this embodiment.
When the receiver 5 is activated, in S1101, the CPU 132 detects whether or not an extended video signal (enhancement layer) has been received. In S1102, the CPU 132 acquires high-quality video, for example, information of a 4K resolution size (horizontal resolution 3840 / vertical resolution 2160, frame rate 60 Hz). At this time, for example, the CPU 132 acquires information on the reference resolution (for example, the size of the resolution of the high quality video) from the display information of the high quality video included in the setting information stored in the nonvolatile memory 127. In S1103, the CPU 132 displays a high-quality video that can be displayed on the display unit 115, for example, a 4K video.

  In S1104, when an operation signal for switching the display video displayed on the display unit 115 is received from the remote controller 302 or the like, the CPU 132 acquires information on the resolution size of the display video displayed after the switching. At this time, for example, the CPU 132 acquires resolution information when displayed on the display unit 115 such as sub-video, multi-screen display, and thumbnail video display included in the setting information stored in the nonvolatile memory 127.

  In step S1105, the resolution comparison unit 134 compares the reference resolution with the resolution of the display video displayed after the display switching, and determines whether the resolution of the display video after the display switching is less than the reference resolution. To do.

When the resolution of the display video after the display switching is equal to or higher than the reference resolution (NO in S1105), the process returns to S1103.
If the resolution of the display video after the display switching is less than the reference resolution (YES in S1105), in S1106, the decoding control unit 133 stops or skips the decoding process of the extended video signal according to the instruction signal from the CPU 132. . At this time, the decoding control unit 133 stops the decoding process of the extended video signal by stopping a part of the operation of the second signal processing unit 602 or stopping the power supply to a part according to the instruction signal of the CPU 132. Or you may skip.

  In addition, in order to stop or skip the decoding process of the extended video signal, the decoding control unit 133 causes the decoding processing unit 221 to send the second TS signal (with the PID filter 642 of the second demultiplexing unit) according to the instruction signal from the CPU 132. The extended video signal) may be filtered. The decoding processor 221 decodes only the first TS signal (reference video signal) and outputs the reference video signal. That is, the decoding processing unit 221 stops or skips the decoding process of the second TS signal (enhanced video signal) according to the instruction signal from the decoding control unit 133.

  In S1107, when the decoding process of the extended video signal is stopped or skipped, the CPU 132 displays a display video composed of the reference video signal as a display video displayed after switching the display on a part or the entire screen of the display unit 115. (Reference image) is displayed on the display unit 115.

  In S408, when the operation signal for switching the display video displayed on the display unit 115 is received again from the remote controller 302 or the like, the CPU 132 acquires information on the resolution of the display video displayed after the switching. At this time, as described above, for example, the CPU 132 sets the resolution when displayed on the display unit 115 such as sub-video, multi-screen display, and thumbnail video display included in the setting information stored in the nonvolatile memory 127. Get information.

  In S1109, as in the processing of S1105, the resolution comparison unit 134 compares the reference resolution with the resolution of the display video displayed after the display switching, and the size of the display video after the display switching is less than the reference resolution. Determine if it exists.

When the resolution of the display video after the display switching is less than the reference resolution (NO in S1109), the process returns to S1106.
When the resolution of the display video after the display switching is equal to or higher than the reference resolution (YES in S1109), in S1110, the CPU 132 displays a high-quality video, for example, a 4K video on the display screen of the display unit 115.

Hereinafter, several examples related to display switching in the receiver 5 according to the first modification of the present embodiment will be described with reference to FIGS. 5A to 9 as in the first embodiment.
FIG. 5A is a diagram illustrating an example of displaying a sub-video on the display video, and FIG. 5B is a diagram illustrating an example of selecting a sub-video in the case of FIG. 5A. 5A and 5B, the display video G1 is a high-quality video, for example, a 4K video, and the display video G2 is a sub-video displayed on the display video G1. The reference resolution is 1/4 the resolution of 4K video (2K video resolution).

  As shown in FIG. 5B, when the operation signal is received from the remote controller 302, the CPU 132 displays the size of the display video G2 and the reference resolution (or the display video G1) when displaying the display video G2 on the display video G1. The resolution size). Then, the resolution comparing unit 134 compares the resolution size of the display video G2 with the reference resolution (or the resolution size of the display video G1), and determines whether the resolution size of the display video G2 is less than the reference resolution. Determine. The resolution comparison unit 134 outputs the comparison result to the CPU 132 and / or the decoding control unit 133. In FIG. 5B, since the resolution of the display video G2 is less than the reference resolution, the decoding control unit 133 decodes the extended video signal according to the instruction signal of the CPU 132, that is, the decoding process of the second signal processing unit 602. To stop (or skip). For example, the decoding processing unit 221 configures the sub-video with the reference video signal and the 2K video signal in accordance with the current broadcast wave decoding process (for example, decoding process of the MPEG-2 encoded signal). For example, when the resolution comparison unit 134 determines that the resolution of the display video is less than the resolution of the 2K video with respect to the resolution of the 4K video that is the reference resolution, the CPU 132 changes the display after switching the display. 2K video is displayed on the display unit 115 as a sub video.

6A is a diagram illustrating an example of displaying a thumbnail video as a display video, and FIG. 6B is a diagram illustrating an example of selecting a thumbnail video in the case of FIG. 6A. The reference resolution is the size of the 4K video resolution.
In FIG. 6A, a display video G3 is a thumbnail video displayed when the d button B1 provided on the remote control 302 is pressed. As shown in FIG. 6B, when the operation signal is received from the remote control 302, the CPU 132 displays the display image G3 with the size of the resolution of the display image G3 and the reference resolution (or the resolution of the display image before display switching). Size). Then, the resolution comparison unit 134 compares the size of the display video G3 with the reference resolution (or the size of the display video before display switching), and the size of the display video G3 is less than the reference resolution. It is determined whether it is. The resolution comparison unit 134 outputs the comparison result to the CPU 132 and / or the decoding control unit 133. As shown in FIG. 6B, when the resolution of the display video G3 is less than the reference resolution, the decoding control unit 133 stops the decoding process of the extended video signal, that is, the decoding process of the second signal processing unit 602 ( Or skip). The decoding processing unit 221 configures a thumbnail video with a reference video signal, for example, a 2K video signal, according to, for example, a current broadcast wave decoding process (for example, a decoding process of an MPEG-2 encoded signal). For example, when the resolution comparison unit 134 determines that the resolution of the display video is less than the resolution of the 4K video that is the reference resolution, the CPU 132 displays the thumbnail video after the display switching. 2K video is displayed on the display unit 115.

  In addition to these examples, FIG. 7 is a diagram illustrating an example of channel selection when a plurality of screens are displayed, and FIG. 8 is a diagram illustrating an example of channel selection of thumbnail images displayed in the recording list. FIG. 9 is a diagram illustrating an example of channel selection of thumbnail videos displayed on the editing screen.

  As shown in FIG. 7, when a plurality of screens are displayed, the resolution comparison unit 134 displays each display video (G4, G5) and the reference resolution (or the resolution of the display video before display switching). To determine whether the resolution of the display images G4 and G5 is less than the resolution of the reference resolution.

As shown in FIG. 8, when thumbnails are displayed in the recording list, as described above,
The resolution comparison unit 134 compares each display video (G6) with the reference resolution (or the size of the display video before display switching), and the display video G4 and G5 have a resolution of the reference resolution. It is determined whether the resolution is less than the size.

  As shown in FIG. 9, even when a plurality of thumbnail images are displayed on the editing screen, as described above, the resolution comparison unit 134 displays the respective display images (G7, G8) and the reference resolution (or before display switching). And the resolution size of the display images G7 and G8 is determined to be less than the resolution size of the reference resolution.

  7 to 9, when the resolution comparison unit 134 determines that the resolution size of the display video is less than the resolution size of the 2K video with respect to the resolution size of the 4K video that is the reference resolution. In other words, the CPU 132 causes the display unit 115 to display 2K video as thumbnail video after display switching.

  According to the present embodiment, the receiver 5 stops (or skips) the high-quality video decoding process when the CPU 132 receives a video display request with a resolution smaller than the reference resolution. For example, when the 4K resolution size is set as the reference resolution, when the receiver 5 receives a display request for a 2K resolution image, the receiver 5 receives a high-quality image by the extended video signal and the reference video signal, for example, The process of restoring the 4K video signal is stopped (or skipped). In this case, the receiver 5 outputs high-quality video, for example, 4K video, as video displayed on the entire screen of the display unit 115, and outputs reference video, for example, 2K video, as display video less than the standard resolution. To do. For this reason, in the receiver 5 of this embodiment, the process which produces | generates a high quality high quality image, for example, 4K image | video with respect to the image | video below reference | standard resolution is suppressed. As a result, in the receiver 5, the processing time for switching display is shortened. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Furthermore, when high-quality video is decoded from the extended video signal and the reference video signal, various processes are required, and the load and power consumption required for the process can be increased. However, in the receiver 5 of the present embodiment, processing for generating a high-quality video for video less than the reference resolution is suppressed, so the load and power consumption required for these processing are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In the present embodiment, the receiver 5 (CPU 132) outputs the reference video signal when the resolution of the display video displayed at the time of switching the display is less than the reference resolution, but the currently displayed display video. Whether the reference image or the high-quality image is displayed may be determined according to the display area of the display unit 115. For example, when the CPU 132 receives an operation instruction signal for requesting display switching from the remote controller 302, the CPU 132 detects that the display video to be displayed next on the display unit 115 is smaller than the display area of the currently displayed display video. The reference image is displayed on the display unit 115 as a display image.

Next, a transmission / reception system according to another embodiment will be described. In other embodiments, the same parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
(Second Embodiment)
In the second embodiment, the receiver 5 further includes a configuration for detecting zapping when the display is switched.

FIG. 12 is a block diagram illustrating an example of the receiver 5 according to the second embodiment.
The system controller 113 further includes a zapping detection unit 135.
The zapping detection unit 135 detects zapping when the display switching operation signal from the remote control 302 or the like exceeds a threshold value during a predetermined time interval, and outputs a detection result. Here, zapping refers to frequent switching of channels (contents and programs) by a remote controller or the like when watching TV. That is, a state in which an operation of continuously switching channels in a short time or continuously switching contents in a short time is a “zapping state”. The zapping detection unit 135 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.

FIG. 13 is a flowchart showing the operation of the receiver 5 of this embodiment.
In the present embodiment, when the receiver 5 is driven, in S1301, the CPU 132 detects whether or not an extended video signal (enhancement layer) is received.
In S1302, the CPU 132 displays a high-quality video that can be displayed on the display unit 115, for example, a 4K video.
In S1303, the CPU 132 receives a signal for requesting channel switching. In step S1304, the zapping detection unit 135 determines whether a predetermined number of channels have been switched during a predetermined time interval. At this time, the zapping detection unit 135 acquires a time interval and a threshold value (reference switching number) related to zapping from the setting information stored in the nonvolatile memory 127. The zapping detection unit 135 determines that it is in the zapping state when it detects channel switching exceeding the reference switching frequency during a predetermined time interval.

If the zapping detection unit 135 does not determine that the zapping state is set (NO in S1304), the process returns to S1302.
When the zapping detection unit 135 determines that the zapping state is set (YES in S1304), in S1305, the CPU 132 predicts the channel of the program that is predicted to be selected next to the channel (program) currently displayed on the display unit 115. (Predicted channel, predicted program) is set. That is, the CPU 132 sets a channel that is predicted to be selected next by the user during zapping (channel prediction). Here, for example, the CPU 132 stores information related to the prediction channel in the nonvolatile memory 127.

In S1306, the CPU 132 receives the extended video signal and / or reference video signal of the program displayed on the channel set as the prediction channel in advance before being displayed. Here, the CPU 132 may temporarily hold the extended video signal and / or reference video signal received in advance in a buffer or a memory. For example, the CPU 132 may be held in the nonvolatile memory 127 and / or the storage unit 129 or the like.
In step S1307, the decoding control unit 133 starts the decoding process of the extended video signal received prior to the decoding processing unit 221 in accordance with the instruction signal from the CPU 132 before receiving the channel switching instruction signal.

In step S <b> 1308, the CPU 132 determines whether the channel selected and displayed next to the channel displayed on the display screen of the display unit 115 immediately before matches the predicted channel.
If it is determined that the selected channel does not match the predicted channel (NO in S1308), the CPU 132 executes normal channel switching in S1309. Here, the normal channel switching is channel switching in a state where there is no previously acquired extended video signal. Therefore, in normal channel switching, the CPU 132 switches the channel according to the current broadcast when the display video after the switching is a reference video that is the current program (broadcast content). Further, in normal channel switching, the CPU 132 sets the delay time because the decoding process takes more time than the decoding process of the reference video signal when the display video after the switching is a high-quality video, for example, a 4K video. Including channel switching.

If it is determined that the selected channel does not match the predicted channel (YES in S1308), in S1310, the CPU 132 executes a decoding process prior to the decoding processing unit 221 (for example, the output selector 96). A high-quality video is output to the display unit 115.
In step S1310, the CPU 132 causes the display unit 115 to display a high-quality video.
Hereinafter, some examples of the prediction channel setting in the zapping state of the CPU 132 will be described with reference to the drawings.

  FIGS. 14A and 14B are diagrams illustrating an example of a prediction channel during zapping, and FIGS. 15A and 15B are diagrams illustrating an example of a prediction channel during zapping. 14A, 14B, 15A, and 15B, B2 includes a button on which a plurality of numbers are described. Each of these buttons is an operation for switching the program displayed on the display unit 115 to the display video of the program assigned in the setting by pressing the number assigned to the channel of the program in the setting. A button for transmitting a signal. B3 is a button for switching to a channel (up or down channel) where the numbers (transmission path, tuner, etc.) assigned to the channel of the program currently displayed on the display unit 115 are adjacent (adjacent).

For example, the CPU 132 sets the channel of the program of the button whose installation position is arranged adjacent to the button of the currently selected program in the remote controller 302 as the predicted channel.
In this case, for example, as illustrated in FIG. 14A, when the button “5” in the button B2 is displayed on the display unit 115, the CPU 132 is adjacent to the button “5” as a predicted channel. Set the channels assigned to the 2 ”,“ 4 ”,“ 6 ”, and“ 8 ”buttons. Further, as shown in FIG. 14B, the CPU 132 has “1”, “3”, “7”, and “9” arranged at an oblique position with respect to the button “5” as the prediction channel. Set the button.

  For example, when the CPU 132 detects that the button number on the remote control 302 is monotonously increasing or monotonically decreasing, the CPU 132 sets the channel of the program assigned to the next button on the remote control 302 as a predicted channel.

  In this case, for example, as shown in FIG. 15A, the CPU 132, for example, in the button B2 arranged on the remote control 302, the “1” button, the “2” button, the “1” button, “ When it is detected that the channels are selected in the order described in the “3” button, the “4” button is set as the prediction channel. Further, as shown in FIG. 15B, the CPU 132 selects, for example, “2” button, “5” button, and “8” button in the order of description on the button B 2 arranged on the remote control 302. When it is detected that the station is stationed, the button “11” is set as the prediction channel.

  In FIGS. 14A, 14B, 15A, and 15B, the channels of all buttons arranged around “5” may be set as the prediction channel. Further, the combination does not have to be as shown in the figure. For example, a free combination of channels of buttons adjacent vertically, horizontally, and diagonally may be set as the prediction channel.

  For example, when the CPU 132 detects that the channel is selected by the channel selection button B3, the next (up) channel or the previous (down) channel adjacent to the channel of the currently displayed program is predicted channel. Set as.

  Further, when the operation signal for requesting channel switching of the remote controller 302 is received by the CPU 132, the nonvolatile memory 127 may include a channel prediction list. The prediction list may be set in advance as a table in the receiver 5 or may be set by the user.

  This prediction list may be created by detecting, for each usage frequency, a channel of a program frequently viewed by the user by the CPU 132. In this case, the CPU 132 sets some channels with high usage frequency other than the channel of the currently displayed program as predicted channels.

  Furthermore, the prediction list may be acquired from the Internet when it can be connected to the Internet. In this case, for example, the prediction list is created by data that accumulates what programs are frequently viewed in the residential area, family structure, age, occupation, sex, time zone, and the like.

  In the present embodiment, the receiver 5 includes a zapping detection unit 135. The zapping detection unit 133 detects that a channel switching operation signal from the remote controller 302 or the like is transmitted a predetermined number of times during a predetermined time interval, and detects that the user is zapping. When zapping is detected, the CPU 132 predicts a channel to be selected next to the currently displayed channel. The CPU 132 acquires the enhancement layer of the prediction channel in advance. When the selected channel matches the predicted channel, the receiver 5 (CPU 132) can immediately decode the high-quality video from the reference video signal and the extended video signal in the decoding processing unit 221. That is, at the time of channel switching, the receiver 5 can immediately display high-quality video on the display unit 115. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Next, a modification of the receiver according to the second embodiment will be described. In the modification of the embodiment, the same reference numerals are given to the same parts as those of the second embodiment described above, and the detailed description thereof is omitted.

(Modification 2)
The receiver 5 according to the second modification of the second embodiment can set a plurality of channel switching methods when the viewing channel is switched.

  In the second modification, the CPU 132 switches the display image according to a preset channel switching setting (channel switching mode) when switching channels. For example, when receiving an operation signal for requesting viewing channel switching from the remote controller 302 or the like, the CPU 132 first displays the reference video on the display unit 115 and displays a high-quality video signal after a certain time (several seconds). At this time, for example, the CPU 132 acquires channel switching information included in the setting information stored in the nonvolatile memory 127.

For example, the receiver 5 of the second modification includes the first mode and the second mode in the setting information as channel switching information.
In the first mode, when a high-quality video is detected when the viewing channel is switched, the channel after switching (second channel) is switched when switching from the video of the channel (first channel) that is currently being viewed before switching. The high-quality video is displayed after displaying the reference video corresponding to. At this time, the decoding control unit 133 controls the decoding processing unit 221 to output to the video processing unit 114 in the order in which the decoding processing is completed.

  In the second mode, when a high-quality video is detected when the viewing channel is switched, the high-quality video is displayed without displaying the reference video.

  For example, when receiving an operation signal for requesting channel switching from the remote controller 302, the CPU 132 displays a 2K video in the first mode, displays a 4K video after a predetermined time, and displays a 4K video in the second mode. . At this time, in the second mode, since it takes time to decode the 4K video, a delay time occurs between the time when the CPU 132 receives the channel switching operation signal and the time when the 4K video is displayed. There is a possibility that an image break, a black screen, or a still image displaying the last frame of the previous image may be inserted. On the other hand, in the first mode, the 2K video is inserted between the time when the CPU 132 receives the channel switching operation signal and the time when the 4K video is displayed. The CPU 132 displays the 4K video on the display unit 115 as soon as the 4K video decoding process is completed.

  FIG. 16 is a flowchart illustrating the operation of the receiver 5 according to the second modification of the present embodiment. Here, it is assumed that the receiver 5 includes the first mode and the second mode in the setting information as the channel switching mode.

In the present embodiment, when the receiver 5 is driven, in S1601, the CPU 132 detects whether or not an extended video signal is received.
In S1602, a channel switching mode is set by the user via the remote controller 302 or the like. Here, the channel switching mode may be preset in the manufacturing stage.

In step S1603, the CPU 132 receives an operation signal for requesting channel switching from the remote controller 302 or the like, and executes channel switching.
In step S1604, the CPU 132 determines whether the channel switching mode is set to the first mode or the second mode.
When the channel switching mode is the first mode (the first mode in S1606), in S1605, the decoding control unit 133 controls the decoding processing unit 221 to output to the video processing unit 114 in the order in which the decoding processing is completed. .

  In step S <b> 1606, the decoding processing unit 221 outputs the reference video until the high-quality video decoding processing is completed according to the instruction signals from the CPU 132 and the decoding control unit 133. For example, the decoding processing unit 221 outputs the 2K video that is the reference video until the decoding process of the 4K video that is the high-quality video is completed according to the instruction signals of the CPU 132 and the decoding control unit 133.

  When the channel switching mode is the second mode (the second mode in S1606), the process proceeds to S1607.

  In S1607, when the decoding process of the high-quality video is completed, the decoding processing unit 221 immediately outputs the reference video as a high-quality video, for example, a 4K video according to the instruction signals from the CPU 132 and the decoding control unit 133.

  Note that this channel switching mode can be applied to channel switching processing related to zapping according to the second embodiment shown in FIG. For example, in the process of S1303, when normal channel switching is performed, the CPU 132 may display the reference video on the display unit 115 until the decoding process of the high-quality video signal is completed. In the process of S1309, in normal channel switching, the CPU 132 may display the reference video on the display unit 115 until the decoding process of the high-quality video signal is completed.

  Hereinafter, some examples of the channel switching setting method will be described with reference to the drawings. In the following, in the receiver 5 of the second modification, an example in which the channel switching setting is set by an operation via a setting screen displayed on the display unit 115 will be described.

FIG. 17 is a diagram illustrating an example of a display switching setting screen.
As shown in FIG. 17, the CPU 132 performs channel switching of the video displayed on the display unit 115 with the display switching setting (first mode or second mode) selected by the user on the selection screen.

FIG. 18 is a diagram illustrating an example of a setting screen on which display switching can be set for each item.
As shown in FIG. 18, the CPU 132 displays video displayed on the display unit according to items, for example, channels, program genres, and channel switching settings (first mode or second mode) set by the user for each program. Perform display switching.

  According to the second modification of the present embodiment, when the receiver 5 receives an operation signal that requests channel switching for a high-quality video, for example, a 4K video program, the receiver 5 displays the high-quality video according to the channel switching mode. 115. When the receiver 5 receives an operation signal for requesting channel switching for a 4K video program, the receiver 5 outputs the 2K video until the 4K video decoding process is completed, and the 4K video decoding process is completed. Then, the 4K video is displayed on the display unit 115. That is, the receiver 5 does not insert an image break, a black screen, or a still image displaying the last frame of the previous image until the 4K video decoding process is completed. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In the first mode, the channel switching timing between the reference video and the high-quality video is set immediately after the decoding process of the high-quality video is completed. However, the CPU 132 displays the display video displayed on the display unit 115. It is also possible to execute channel switching at the moment when the scene changes. In addition, after the high-definition video decoding process is completed, the CPU 132 can also perform channel switching at a set time and time.

(Third embodiment)
In the third embodiment, the receiver 5 has a function for detecting an unused tuner (unused tuner) in addition to the configuration and functions of the above-described embodiment, when the display is switched. .

FIG. 19 is a block diagram illustrating an example of the receiver 5 according to the third embodiment.
The system controller 113 of the third embodiment further includes a tuner detection unit 136.

The tuner detection unit 136 detects a tuner included in the input unit 111 and information related to the tuner, and outputs a detection result. In response to an operation instruction from the remote control 302 or the like, for example, when an operation signal for requesting display of high-quality video is received, the tuner detection unit 136 performs tuner detection according to the instruction signal from the CPU 132. Further, the tuner detection unit 136 may always detect the tuner while the receiver 5 is activated. At this time, the acquired extended video signal and / or reference video signal may be temporarily stored in a buffer and / or a memory. For example, the extended video signal and / or the reference video signal received by the detected tuner may be stored in the nonvolatile memory 127 and / or the storage unit 129. Note that the tuner detection unit 136 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.
The decoding control unit 133 controls the decoding process according to the tuner setting.

In response to the detection result of the tuner detection unit 136, the CPU 132 can update setting information related to reception for the tuner in the input unit 111.
For example, the input unit 111 includes a tuner set for receiving terrestrial digital, BS broadcasting, and CS broadcasting. In this case, each of the tuners for receiving BS broadcasts and CS broadcasts receives broadcast waves of BS broadcasts and CS broadcasts at normal times. When receiving the detection result that the tuner for receiving BS broadcast and CS broadcast is not used, the CPU 132 updates the reception setting of the tuner so that the tuner for receiving BS broadcast receives the reference video signal or the extended video signal. (Changed). In this case, the receiver 5 may perform tuner setting with reference to the PMT or the like of the extended video signal. The receiver 5 may set a tuner with reference to NIT included in signals such as terrestrial digital, BS broadcast, and CS broadcast transmitted as the reference video signal. At this time, the receiver 5 has, for example, a descriptor (for example, an EIT (Event Information Table), a Hyper_Link descriptor, etc.) linked so as to refer to the NIT included in the extended video signal corresponding to the reference video signal referred to. ) To refer to the NIT of the extended video signal.

FIG. 20 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In the present embodiment, when the receiver 5 is driven, in S2001, the CPU 132 detects whether or not an extended video signal is received.
In S2002, the tuner detection unit 136 detects a tuner and outputs the detection result to the CPU 132.

In S2003, the CPU 132 detects an unused tuner from the detection result of the tuner detection unit 136.
If there is no unused tuner (NO in S2003), the process returns to S2002.
When there is an unused tuner (YES in S2003), in S2004, the CPU 132 receives an unused tuner (such as an extended video signal corresponding to the display video of the channel currently being viewed (displayed) on the display unit 115. First unused tuner) is set.

  In step S2005, the tuner detection unit 136 detects a tuner and outputs the detection result to the CPU 132.

In S2006, the CPU 132 receives the detection result of the tuner detection unit 136 and determines whether there is an unused tuner.
If there is no unused tuner (NO in S2006), the process returns to S2005.
If there is an unused tuner (YES in S2006), in S2007, the CPU 132 receives an unused tuner (first tuner) so as to receive an extended video signal of another channel different from the channel currently being viewed (displayed) on the display unit 115. 2 unused tuner). For example, when an operation signal for requesting channel switching is received, if the extended video signal of the channel after switching has already been acquired, the CPU 132 can quickly decode the high-quality video and display it on the display unit 115. .

  In step S2008, the decoding control unit 133 controls the decoding processing unit 221 so as to decode the extended video signal corresponding to the acquired program currently being viewed.

In S2009, the CPU 132 receives an operation signal for requesting channel switching from the remote controller 302 or the like, and executes display switching.
In step S2011, the CPU 132 causes the decoding processing unit 221 to output a video according to the operation signal. When a program composed of high-quality video decoded from the acquired extended video signal is selected, the decoding processing unit 221 can quickly output high-quality video.

  According to the present embodiment, the receiver 5 includes a tuner detection unit 136 that detects an unused tuner. The CPU 132 can receive the detection result of the tuner detection unit 136 and acquire the extended video signal in advance using an unused tuner. The decoding processing unit 221 can decode the high-quality video in advance according to the instruction signal from the decoding control unit 133. As a result, when the display is switched, the receiver 5 shortens the delay time that occurs until the 4K video decoding process is completed, so that the image is interrupted, the black screen, or the last image of the previous image. A high-quality video can be displayed on the display unit 115 without inserting a still image or the like displaying a frame. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

(Fourth embodiment)
In the fourth embodiment, in addition to the configuration and functions of the above-described embodiment, the receiver 5 further includes a configuration that can set display of a high-quality video when the display is switched.

FIG. 21 is a block diagram illustrating an example of the receiver 5 according to the fourth embodiment.
The receiver 5 according to the fourth embodiment further includes a program information detection unit 137. In addition, the receiver 5 according to the present embodiment includes information (display setting information) indicating whether or not display of high-quality video is permitted. That is, the display setting information indicates whether to display a reference image or a high-quality image. For example, the display setting information is provided in the nonvolatile memory 127 and / or the storage unit 129.

The program information detection unit 137 detects information related to the program, determines whether display permission to display a high-quality image from the display setting information is set, and outputs information on the determination result. . The program information detection unit 137 acquires, for example, a program channel, type (genre), program information, program content, and broadcast time. For example, the program information detection unit 137 can read an EIT (Event Information Table) from the stream (signal). The display setting information may be set in advance or may be set by the user via the display screen. The program information detection unit 137 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.
Hereinafter, some examples related to the display setting of high-quality video in the receiver 5 of the present embodiment will be described with reference to the drawings. FIG. 22, FIG. 23 (a), (b), and FIG. 24 (a), (b) are examples of a display setting screen for high-quality video according to the present embodiment.
For example, as shown in FIG. 22, the user can set display of high-quality video for each channel, genre, and program on the screen displayed on the display unit 115 via the remote controller 302 or the like. In FIG. 22, when “ON” is set, the CPU 132 displays a high-quality video on the display unit 115. In the case of “OFF” in FIG. 22, the CPU 132 displays the reference video on the display unit 115 without displaying the high-quality video.

  Also, as shown in FIG. 23A, when setting for each genre, whether to display a high-quality video as a genre can be set, and more detailed setting can also be made. For example, as shown in FIG. 23A, the display of high-quality video is set to “ON” for sports tennis, soccer, and baseball. In this case, as shown in FIG. 21B, the landscape video G9 is displayed as a reference video, for example, a 2K video, while the tennis video G10 is displayed as a high-quality video, for example, a 4K video. .

  As shown in FIG. 24A, by setting terms, the CPU 132 automatically determines whether to display a high-quality video when the set terms are included in the program information. For example, as shown in FIG. 24A, when the user adds terms such as “superb view” and “beautiful” to the display setting information, the CPU 132 checks the term set in the program information when the term is set. A high-quality image is displayed on the display unit 115. In the case as shown in FIG. 22B, the program “□ ΔΔ” and the program “◯◯ □” in which “superb view” and “beautiful” are included in the program information are displayed as high-quality images. In such a case, the decoding control unit 133 controls the decoding processing unit 221 so that the extended video signal of the program including the set term in the program information is acquired in advance.

FIG. 25 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In the present embodiment, when the receiver 5 is driven, in S2501, the CPU 132 detects whether or not an extended video signal has been received.
In S2502, the user sets display settings for high-quality video via the remote control 302 or the like. Note that display settings for high-quality video may be set in advance at the manufacturing stage.
In S2503, the CPU 132 receives an operation signal for requesting display switching from the remote controller 302 or the like, and executes display switching.
In step S2504, the CPU 132 determines whether there is an extended video signal for video to be displayed after display switching.

  If it is determined that there is no extended video signal (NO in S2504), the process returns to S2503.

  If it is determined that the extended video signal is present (YES in S2504), in S2505, the program information detection unit 137 detects the program information of the display video to be displayed after display switching according to the instruction signal of the CPU 132. Here, the program information includes, for example, a channel, a broadcast time of the program, a broadcast area, a program (content), a type of program (genre), and the like.

  In S2506, the program information detection unit 137 detects display setting information. Here, for example, the program information detection unit 137 detects display setting information from the nonvolatile memory 127.

  In step S2507, the program information detection unit 137 determines whether display permission for the high-quality video is set for the display video displayed from the program information and the display setting information.

  If it is determined that display permission for high-quality video is set (YES in S2507), the CPU 132 causes the decoding processing unit 221 to output in S2508.

If it is determined that display permission for high-quality video is not set (NO in S2507), in S2509, the decoding control unit 133 stops or skips the decoding process of the extended video signal in accordance with the instruction signal from the CPU 132. Therefore, the decoding processing unit 221 decodes and outputs only the reference video signal.
In step S <b> 2510, the CPU 132 displays a reference image as a display image on the display screen of the display unit 115.

  According to the present embodiment, the receiver 5 includes information on display settings for high-quality video in the nonvolatile memory 127. In accordance with this display setting, the CPU 132 determines, for example, whether display permission for high-quality video is set for each channel, program, and program type (genre). The receiver 5 stops (or skips) the decoding process of the high-quality video when the display video to be displayed next is the display setting and the display permission for the high-quality video is not set, and displays the reference video on the display unit 115. Therefore, the receiver 5 of the present embodiment can efficiently execute the high-quality video decoding process by setting the display setting.

  In the present embodiment, when a signal (third video signal) constituting a high-quality video can be received by one transmission path instead of two transmission paths, the receiver 5 relates to display permission information and the like. Without receiving high-quality video. For example, when 4K video is broadcast by CS broadcasting or the like, the receiver 5 has at least one dedicated tuner (high performance tuner) capable of receiving a signal (third video signal) constituting the 4K video. And 4K video is received through this dedicated tuner regardless of the display setting information. Here, the receiver 5 is a television receiver or the like that supports both 4K broadcasting and scalable broadcasting.

(Fifth embodiment)
In the fifth embodiment, the receiver 5 further includes a sensor 401 in addition to the configuration and functions of the above-described embodiment.

FIG. 26 is a block diagram illustrating an example of the receiver 5 according to the fifth embodiment.
The receiver 5 of the fifth embodiment further includes a sensor 401.
The sensor 401 detects the person (viewer) who is viewing the receiver 5, the state of the viewer, and the like, and outputs the detection result. The sensor 401 is a variety of sensors, and includes, for example, an optical sensor, a human sensor, a temperature sensor, an optical sensor, an acceleration sensor, and the like.
The decoding control unit 133 controls the decoding processing unit 221 according to the detection result of the sensor 401. For example, when the sensor 401 cannot detect the viewer for a predetermined time (detection time) or longer, the decoding control unit 133 stops or skips the decoding process of the extended video signal according to the instruction signal of the CPU 132. The detection time may be arbitrarily set by the user, or may be set at the manufacturing stage. Further, the setting information of the nonvolatile memory 127 may include information regarding the detection time.

FIG. 27 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In the present embodiment, when the receiver 5 is driven, in S2701, the CPU 132 detects whether or not an extended video signal has been received.
In S2702, the CPU 132 displays the high-quality video on the display unit 115.
In S2703, the sensor 401 detects whether there is a viewer.

If it is determined that there is a viewer (YES in S2703), the process proceeds to S2702.
If it is determined that there is no viewer (NO in S2703), in S2704, the decoding control unit 133 stops or skips the decoding process of the extended video signal according to the instruction signal from the CPU 132. Therefore, the decoding processing unit 221 decodes and outputs only the reference video signal.
In S <b> 2705, the CPU 132 displays a reference video as a display video on the display screen of the display unit 115.
In step S2706, the sensor 401 detects again whether there is a viewer.

If it is determined that there is no viewer (NO in S2706), the process proceeds to S2705.
If it is determined that there is a viewer (YES in S2706), in S2707, the decoding control unit 133 controls to start the decoding process of the extended video signal in accordance with the instruction signal from the CPU 132.
In S <b> 2708, the CPU 132 displays a high-quality video as a display video on the display screen of the display unit 115.

  According to the present embodiment, the receiver 5 can detect the presence or absence of a viewer by the sensor 401. When there is no viewer, the CPU 132 stops (or skips) the decoding process of the high-quality video and displays the reference video on the display unit 115. Therefore, the receiver 5 of the present embodiment can efficiently execute the high-quality video decoding process by setting the display setting.

According to the above-described embodiment, the display switching processing time is shortened in the receiver 5.
Furthermore, the receiver 5 can stop the decoding process of the high-quality video according to the display switching status. As a result, in the receiver 5, the load and power consumption required for the decoding process of high-quality video are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

In the above-described embodiment, the reference video signal and the extended video signal are transmitted through transmission paths that transmit different broadcast waves, but may be transmitted over the Internet as transmission paths. For example, as illustrated in FIG. 28, the transmission / reception system 1 includes a transmitter (transmitting device) 3, a receiver (receiving device) 5, and a server 7. In the transmission / reception system 1, the transmitter 3, the receiver 5, and the server 7 are connected by wired and / or wireless broadcast and communication transmission paths, respectively. In the transmission / reception system 1, the transmitter 3 distributes program content using, for example, broadcast waves as a medium. The server 7 distributes program content via the Internet line. The transmission / reception system 1 includes transmission paths 801, 802, and 803. In the transmission / reception system 1, the transmitter 3 can transmit the reference video signal and the extended video signal by the transmission path 801 and the transmission path that transmits the transmission path 802 and the transmission path 803 via the server 7. . In this case, as shown in the above-described embodiment, the CPU 132 executes display switching. For example, as shown in FIG. 29, in the case where the video acquired through the Internet line is displayed on the display unit 115, if the display video G11 is lower than the reference resolution, the CPU 132 stops the decoding process of the high-quality video ( (Or skip) to display the reference image.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof, as long as they are included in the scope and gist of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Transmission / reception system, 3 ... Transmitter (transmission apparatus), 4 ... Transmission signal processing apparatus, 5 ... Receiver (reception apparatus), 7 ... Server 10, 16, 22, 40, 60, 80 ... Input terminal, 58 , 97 ... output terminal, 64 ... first demultiplexing unit, 66 ... first descrambler, 68 ... decoder, 70 ... first ECM / EMM processing unit, 72 ... clock recovery control unit, 74 ... upconverter 76 ... buffer, 78 ... SHVC decoder, 84 ... second demultiplexing unit, 86 ... second ECM / EMM processing unit, 88 ... second descrambler, 90 ... PSI / SI processing unit, 92 ... Metadata processing unit, 94 ... Image quality improvement processing unit, 104 ... Antenna unit, 105 ... External input terminal, 111 ... Input unit, 112 ... Signal processing unit, 113 ... System controller (system control unit), 114 ... Video processing 115, display unit, 116 audio processing unit, 117 ... audio output unit, 119 ... operation unit, 120 ... receiving unit, 121 ... communication interface, 122 ... network control unit, 123 ... USB interface, 124 ... HDMI, 125 DESCRIPTION OF SYMBOLS ... Storage part 211 ... Decoding processing part 501 ... 1st signal generation part 502 ... 2nd signal generation part 601 ... 1st signal processing part 602 ... 2nd signal processing part 801 ... 1st 802... 2nd transmission line, 803... 3rd transmission line

Claims (14)

A receiver that includes at least one tuner and that receives a first video signal and a second video signal used to improve the image quality of the first video signal;
The first video signal can be decoded to generate a first video having a first resolution, and the first video signal and the second video signal can be decoded to generate the first video having the first resolution. A decoding unit capable of generating a second video having a second resolution with a higher image quality than the first video, and outputting either the first video or the second video;
When the resolution of the area where the first video or the second video is displayed is larger than a threshold value, the second video is displayed, and the first video or the second video is displayed. An electronic device comprising: a control unit that displays the first video when the resolution of the displayed area is equal to or less than a threshold value.   When switching from the first channel to the second channel, the first video corresponding to the second channel is displayed first, and then the second video corresponding to the second channel is displayed. The electronic device according to claim 1, wherein the second image having a resolution is displayed.   When the channel is switched, first the first image having the first resolution corresponding to the switched channel is displayed, and then the second image having the second resolution corresponding to the channel is displayed. 3. The mode according to claim 1, wherein when the channel is switched, it is possible to set whether the second mode is to display the second video having the second resolution corresponding to the channel switched from the beginning. Electronic equipment.   When the channel is switched, the receiving unit receives at least one of the first video signal and the second video signal corresponding to the channel to be switched next before the channel is switched next. The electronic device according to any one of claims 1 to 3.   When there is an unused tuner that has not received the video signal corresponding to the channel currently selected, the unused tuner is the first video signal corresponding to the channel other than the channel currently selected or the second The electronic device according to claim 1, wherein at least one of the video signals is received.   The at least one program is designated, and it is possible to set whether to display the video corresponding to the designated program by the first resolution or the second resolution. The electronic device according to any one of 5.   In the case where the receiving unit receives a single video signal corresponding to the video of the second resolution, and the plurality of programs received by the single video signal, the first resolution The electronic device according to claim 6, wherein when the first program designated to display video is included, the control unit displays the first program with the second resolution. Using at least one tuner to receive a first video signal and a second video signal used to improve the image quality of the first video signal;
The first video signal can be decoded to generate a first video having a first resolution, and the first video signal and the second video signal can be decoded to generate the first video having the first resolution. Generating a second video having a second resolution with a higher image quality than the first video, and outputting either the first video or the second video;
When the resolution of the area where the first video or the second video is displayed is larger than a threshold value, the second video is displayed, and the first video or the second video is displayed. A display method for displaying the first video when a resolution size of a displayed area is equal to or less than a threshold value.   When switching from the first channel to the second channel, the first video corresponding to the second channel is displayed first, and then the second video corresponding to the second channel is displayed. The display method according to claim 8, wherein a second image having a resolution is displayed.   When the channel is switched, first the first image having the first resolution corresponding to the switched channel is displayed, and then the second image having the second resolution corresponding to the channel is displayed. When a mode or a channel is switched, either one of a second mode for displaying a second video of the second resolution corresponding to the channel switched from the beginning is selected and displayed. The display method according to claim 8 or 9.   9. When the channel is switched, the receiving unit receives at least one of the first video signal and the second video signal corresponding to the next channel to be switched before the next channel is switched. The display method according to claim 10.   When there is an unused tuner that has not received the video signal corresponding to the channel currently selected, the unused tuner is the first video signal corresponding to the channel other than the channel currently selected or the second The display method according to claim 8, wherein at least one of the video signals is received.   9. At least one program is designated, and video corresponding to the designated program is set to be displayed at the first resolution or the second resolution and displayed. Item 13. The display method according to any one of Items12.   Receive a single video signal corresponding to the video of the second resolution, and display at the first resolution in a plurality of programs received by the single video signal The display method according to claim 13, wherein when the first program set to be included is included, the first program is displayed at the second resolution.

Images