WO2011152170A1

WO2011152170A1 - Video processing device

Info

Publication number: WO2011152170A1
Application number: PCT/JP2011/060532
Authority: WO
Inventors: 禎三橋; 賢司太田
Original assignee: シャープ株式会社
Priority date: 2010-05-31
Filing date: 2011-05-02
Publication date: 2011-12-08
Also published as: JP2011250358A

Abstract

Disclosed is a video processing device that records a received video signal. A video processing device comprises a decoder unit that carries out a decoding process on a video signal; an output compositing unit that carries out compositing, in order to display an image of a first screen display based on the video signal decoded by the decoder unit on at least a portion of a display device, together with a second screen display in progress; and a controller unit that controls the overall system. The video processing device further comprises a decode process control unit that adjusts the load for processing, to carry out the first screen display, of the video signal in the decoder unit. It is thus possible to confirm the current viewing and recording state without increased processing load.

Description

Video processing device

The present invention relates to a video processing technique for received video content such as digital broadcasting.

In recent years, video recording devices equipped with television broadcast receivers are not limited to dedicated television broadcast receivers, but are installed in various devices such as mobile phones and general-purpose personal computers. In such devices used for various purposes other than video recording and viewing, it is necessary for the CPU to operate applications and video signal processing related to video conversion for improving the compression rate during video recording. Processing capacity is increasing.

By the way, MPEG (Moving Picture Coding Experts Group) video coding is used in television broadcasting and recording equipment. In an apparatus that decodes MPEG-encoded image data, input encoded data is sequentially stored in a buffer, the input data is sequentially read, and necessary information is separated by a demultiplexer. Next, variable length decoding, inverse quantizer, inverse DCT (Inverse Discrete Cosine Transform), and motion compensation by motion prediction using the previous or subsequent frame are performed and stored in the frame buffer. The picture order is arranged by rearranging the pictures, read out in the order to be displayed, and output on the screen.

Furthermore, the moving picture data encoded by this MPEG system is divided into three types of picture (picture) types based on the inter-frame prediction method, that is, an I picture that is an image that is independently encoded within a picture, and unidirectional inter-frame prediction. It has a P picture, which is an image to be encoded, and a B picture, which is an image to be subjected to bidirectional interframe prediction encoding.

Here, there has been proposed a method for easily reproducing video with a low processing amount and a low load by reducing processing at the time of decoding.

For example, in the moving picture decoding apparatus and moving picture decoding method described in Patent Document 1 below, the high frequency part of the horizontal frequency is removed from the orthogonal transform coefficients when performing the inverse discrete cosine transform processing at the time of MPEG decoding. In this way, the processing required for decoding is reduced, or the processing load at the time of decoding is reduced by supplying only the I picture to the video decoding unit in the reproduction of moving image data encoded by the MPEG method. Things are possible.

Further, in the following Patent Document 2, at the time of recording a television broadcast, once decoding processing is performed, based on a preset conversion rule, the encoder unit converts a predetermined I picture into a P picture for each GOP. A method is disclosed in which a TS conversion process for converting a predetermined P picture into a B picture is performed, and a re-encoding process is performed so as to reduce the amount of data.

On the other hand, by providing dedicated hardware necessary for decoding processing, it is possible to perform decoding processing without increasing the CPU load. For example, it may be necessary to simultaneously decode a plurality of streams, such as displaying a plurality of videos simultaneously on the screen. However, in this case, preparing the necessary number of decoders has the disadvantage that the circuit scale increases due to dedicated hardware, leading to an increase in cost and an increase in power consumption.

In addition, there is a demand for confirming a video being recorded even in a video recording device that does not include such a hardware decoder and includes a television broadcast receiving device with insufficient CPU processing capability. This is because, for example, on a PC having a TV tuner with a small processing capacity of a CPU or a mobile terminal such as a mobile phone, the user wants to check the video content currently recorded while performing other work, There is a demand to view a plurality of videos even during recording.

JP 2002-112195 A JP 2005-123829 A

In order to record the video signal without degrading the video quality, it is only necessary to store the TS stream, so there is no need to perform the decoding process, but the decoding process is required to view the video being recorded. Must be done.

Furthermore, when the TS conversion process as described above is involved, it is necessary to perform the decoding process regardless of the presence or absence of display, and the processing amount increases.

However, in a standard such as high-definition broadcasting in digital broadcasting, it is necessary to decode a high-definition video signal of 1080 × 1920 pixels, and a large amount of CPU resources is consumed for decoding processing.

For this reason, recording with high-definition data such as high-definition video on a device with a small CPU processing capacity, etc. not only uses up CPU resources, but also processes related to recording. There is a problem of hindrance.

The present invention has been made in view of the above circumstances, and while recording a video, without increasing the processing load and without adding extra hardware, confirming the video being recorded, An object is to provide a video processing apparatus capable of reproducing a plurality of contents.

According to an aspect of the present invention, in a video processing apparatus that records a received video signal, a decoder unit that performs a decoding process of the video signal, and a first screen display based on the video decoded by the decoder unit, An image processing apparatus having an output composition unit for performing composition for displaying an image together with a second screen display during work, and a control unit for controlling the whole, on at least a part of the display device. There is provided a video processing apparatus comprising a decoding processing control unit for adjusting a processing load in the decoder unit of a video signal for performing screen display.

The decoding processing control unit may include an output frame determining unit that determines whether or not to perform decoding processing in units of picture types. For example, the processing load can be reduced by not processing the B picture or by not processing the P and B pictures.

Furthermore, it is preferable to have a screen configuration determination unit that sends a command for adjusting the picture type of the first screen display to the output frame determination unit in a direction in which the load decreases based on the load of the control unit.

In addition, the decoding processing control unit includes an output size determining unit that performs video reduction or reduction of a decoding processing amount accompanying a reduction in video resolution in accordance with the output size or video resolution of the first screen display. Also good. The reduction of the processing load accompanying the reduction of the image resolution is a reduction of the processing load accompanying the reduction of the image resolution by the low-frequency component inverse DCT processing.

Further, the processing load associated with the reduction of the image resolution may be reduced according to the resolution of the display device.

Furthermore, it is preferable to have a screen configuration determining unit that sends a command for adjusting the display size of the first screen display to the output size determining unit in a direction in which the load decreases based on the load of the control unit.

This allows the recorded video to be played and confirmed with a small processing load while performing the recording process, so that the hardware scale is not increased and the power consumption for the process can be reduced.

In the above, the data storage unit that records the video signal before decoding by the decoder unit, and the video signal being acquired and the video signal stored in the data storage unit are selectively output to the decoding unit And a switch to be used. As a result, either the recorded video or the video currently being acquired can be set as the second screen display. Further, it is possible to record the received signal without deteriorating the image quality and changing the resolution.

Further, the received signal may be recorded in the storage unit after the code amount is reduced by a designated method. The decoding process with a reduced processing load for the first screen display is preferably to reduce the processing load by decoding only a part of the moving image data in the received data.

Part of the received data is motion compensated by a first frame that is two-dimensional compressed video data that is information-compressed in a frame and a first frame that is information-compressed in a temporally forward frame. In addition, the second frame, which is information-compressed three-dimensional compressed video data, and the three-dimensional compressed video data, which is information-compressed by adding motion compensation by the first frame or the second frame in the longitudinal direction in time. It is preferable to reduce the processing load by decoding only part of the moving image data, which is encoded data including a third frame.
When determining whether the first screen display is to be performed on at least a part of the display device by using the information of the content being recorded as characters or at least a part of the display device according to the processing load in the control unit Convenient. When the first image display is performed on at least a part of the display device, a display having a resolution corresponding to a designated size may be performed.

Also, a plurality of tuner units may be provided to record a plurality of signals, and the first display may be divided into a plurality of parts and displayed on at least a part of the display device. For the second screen display, at least one hardware decoding circuit may be provided. As a result, the image decoded by the hardware decoding circuit can be displayed in a larger size than the plurality of reduced images.

According to another aspect of the present invention, a step of performing a decoding process on a received video signal and a first screen display based on the decoded video are provided on at least a part of the display device as a second working And a step of performing a composition for displaying an image together with the screen display, and a decoding processing control step for adjusting a load of the decoding processing of the video signal for performing the first screen display. A featured video recording method is provided. Further, the present invention may be a program for causing a computer to execute the method described above, or a computer-readable recording medium for recording the program.

This specification includes the contents described in the specification and / or drawings of Japanese Patent Application No. 2010-124206 which is the basis of the priority of the present application.

According to the video processing apparatus of the present invention, recorded video can be confirmed and a plurality of contents can be reproduced with a small processing load while recording. Therefore, the scale of hardware is not increased, and power consumption for processing can be reduced.

It is the functional block diagram which showed one structural example of the video processing apparatus which concerns on the 1st Embodiment of this invention as a video recording apparatus. It is a functional block diagram which shows the process detailed structure of the decoder part of FIG. It is a block diagram which shows the decoding process control which concerns on this Embodiment. It is a flowchart for demonstrating the operation | movement which concerns on a decoding process part. It is a functional block diagram which shows the whole detailed process structure which concerns on this Embodiment. It is a figure which shows the example of the display size determined by the screen structure determination part which concerns on this Embodiment, and arrangement | positioning. It is a figure which shows the example of 1 structure of the video processing apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example of the display size determined by the screen structure determination part which concerns on this Embodiment, and arrangement | positioning. It is a functional block diagram which shows the example of 1 structure of the video processing apparatus provided with the hardware decoding circuit which concerns on this Embodiment.

(First embodiment)
Preferred embodiments of a multi-screen display device according to the present invention will be described below with reference to the drawings. In the first embodiment of the present invention, an implementation of a video processing apparatus having a function of recording received digital broadcasts and a function of displaying with low load, and intended to use both functions simultaneously. A form is demonstrated.

FIG. 1 is a diagram showing a configuration example of a video processing apparatus (video recording apparatus and video display apparatus) according to the present invention. The tuner unit 3 is, for example, a BS / CS digital tuner, a terrestrial digital tuner, and the like. The tuner unit 3 amplifies a broadcast signal such as terrestrial digital and BS / CS received by the antenna 1 and selects a channel given from the control unit 21. A broadcast signal of a specific frequency channel is selected and received based on the signal. The selection of the broadcast signal to be received is given by the user with a general operation device 23 that is effective for screen operations such as a remote control, a mouse, and a touch panel.

The received signal is analog / digital converted by an A / D (A n a l o g / D i g i t a l) converter 5, and the digital signal of the selected channel is demodulated by the demodulator 7 to obtain video data. Get. For example, a terrestrial digital broadcast signal is modulated by an OFDM (Orthogonal Frequency Division Multiplexing) method, and the demodulator 7 can demodulate the broadcast signal into video data in MPEG2 TS (Transport Stream) format.

A necessary TS stream is obtained by a TS stream demultiplexer 9 that separates necessary video data and audio data in accordance with each PID (Packet Identification) such as set video data and audio data.

Here, when the user wants to view the received broadcast at a later stage in time, the obtained TS stream is recorded in the data storage unit 27. The data to be recorded may be the entire TS stream obtained after demodulation by the demodulator 7, or the TS stream from which only data necessary for reproduction is extracted by the TS demultiplexer 9 can be recorded.

Further, the data to be recorded may be recorded in the data storage unit 27 after appropriate code amount reduction without changing the resolution. For example, it can be realized by converting to H.264 / AVC or the like that can realize higher compression efficiency.

The data storage unit 27 is a non-volatile storage medium for storing video data, for example, a hard disk drive, a recording medium such as an SSD (Solid State Drive), an SD card, an optical disk such as a DVD or a Blu-ray disc, and the like. The TS stream needs to be written at any time.

In order to view / confirm the video being recorded while recording the TS stream, it is necessary to decode the obtained received data by the decoder unit 15 controlled by the decoding processing control unit 11. The switch 10b for switching which of the output from the demodulator 7 and the output from the TS demultiplexer 9 is input to the data storage unit 27, the output from the TS demultiplexer 9 and the output from the data storage unit 27 A switch 10a for switching whether to output to the decoder unit 15 is provided. In addition, an output composition unit 17 and a screen configuration determination unit 25 described later are included.

Here, details of the processing of the decoder unit 15 will be described with reference to FIG.

FIG. 2 is a functional block diagram showing a configuration example of the decoder unit 15 according to the present embodiment. 2 includes a demultiplexer 31, a variable length decoding unit 33, an inverse quantization unit 35, an inverse DCT unit 37, a decoding process control unit 39, a picture rearrangement unit 41, a motion prediction unit 45, and a picture storage unit 43. It consists of

The demultiplexer 31 supplies the encoded data to the variable length decoding unit 33, and in the case of a motion vector, supplies the motion vector and the encoding mode to the motion prediction unit 45.

The variable length decoding unit 33 detects a variable length code from the supplied code, returns it to a fixed length code, and supplies it to the inverse quantization unit 35.

The inverse quantization unit 35 inversely transforms the code of the transform coefficient quantized on the encoding side to the original transform coefficient, and inversely quantizes the inverse DCT by the quantization step size from the demultiplexer 31. To the unit 37.

The inverse DCT unit 37 inversely transforms the transform coefficient from the inverse quantization unit 35 to the original pixel value. The inverse DCT unit 37 converts the video signal for each macroblock that has been DCT (discrete cosine transform) transformed by the encoding side. Reproduce. The reproduced video signal is supplied to the picture rearrangement unit 41 via the adder 47 or temporarily stored in the picture storage unit 43.

The motion prediction unit 45 generates a video signal of the current frame obtained by performing motion compensation on the video signal of the previous frame from the picture storage unit 43 using a motion vector. The motion-corrected video signal is added to the video signal from the inverse DCT unit 37 in the adder 47 and stored in the frame buffer 40.

The picture rearrangement unit 41 arranges the order of the pictures of the video signal from the frame buffer 40 and outputs the video signals read in the order to be displayed.

Further, the decoding unit 15 in the present embodiment includes a decoding processing control unit 39 that reduces the decoding processing load according to the processing load state of the CPU. The decoding process control unit 39 can provide a parameter that provides a decoding process with a low load during inverse quantization and inverse DCT.

Here, as will be described later with reference to FIG. 3, the decoding processing control unit 39 includes an output frame determination unit and an output size determination unit.

FIG. 3 is a functional block diagram showing the decoding process control according to the present embodiment. However, the processing diagram in the decoder unit 15 is simplified.

In the preceding decoding processing control unit 39 of the decoder unit 15, the output frame determination unit 39 a receives information in the first frame that is two-dimensionally compressed video data that is information-compressed in the frame and information in the temporally forward frame. Add motion compensation with the first frame or the second frame in the front-rear direction and the second frame, which is 3D compressed video data that has been compressed by adding motion compensation with the compressed first frame. The processing load is reduced by decoding only a part of the moving image data of the encoded data including the third frame that is the 3D compressed video data that is information-compressed. Can be done.

For example, in MPEG2, it is determined whether or not to perform decoding processing for each picture type of I, P, and B (in picture type units). For example, the processing load can be reduced by not processing the B picture or by not processing the P and B pictures.

In addition, while storing the TS stream in a state where the video being received is not deteriorated in the recording medium, the video being recorded is subjected to a light load decoding that is simplified and displayed in a small size, thereby performing a recording process. Even in a PC or mobile terminal that does not have sufficient processing performance to perform complete decoding processing and display processing, for example, a display as shown in FIG. 8 is added to one video being recorded as will be described later. When performed as multiple local content videos, this display method can be realized with a low load by simplifying the process, and later, by using a saved TS stream, it can be displayed in high definition even if it is displayed in full screen. There is an advantage.

Furthermore, the output size determination unit 39b reduces the amount of decoding processing accompanying image reduction according to the determined output size. For example, the amount of processing can be reduced by removing the high frequency part of the horizontal frequency from the 16 × 16 DCT coefficients and performing inverse DCT processing using the coefficients of 8 × 8, 4 × 4, 2 × 2. However, the resolution can be lowered. Or you may make it reduce the processing load accompanying reduction of image resolution according to the resolution of a display apparatus.

Each parameter value in the decoding process control unit 39 is determined by the processing load state and screen configuration determination unit (25: FIG. 1) of the CPU.

Here, the flow of processing in the decoding processing control unit 39 is shown in FIG. First, the designated output size is detected. The output size determination unit (FIG. 3: 39b) selects the maximum output size that is equal to or smaller than the specified size and is obtained by high-frequency removal of the DCT coefficient (S102). Here, it is determined whether or not decoding processing can be performed with the specified size obtained (S103). This determination can be made, for example, by obtaining the CPU load status obtained from the control unit. The higher the current load, the better the decoding process with a smaller size. If the load is below a certain level (YES), the output frame determination unit (FIG. 3: 39a) determines to perform processing of a predetermined picture type (S104). When there is a processing load above a certain level and the CPU load status exceeds a predetermined value (NO), the output frame determination unit determines to change the decoded picture (S105). Even when the decoding process for only the I picture is performed, if the CPU load state exceeds a predetermined value, the output frame determination unit (FIG. 3: 39a) determines not to perform the decoding process.

FIG. 5 is a diagram illustrating an overall detailed configuration example according to the present embodiment. The screen configuration determination unit 25 determines the size and arrangement to be output based on operation information given from the user by the operation device 23 such as a remote controller, a mouse, and a touch panel, and CPU load information obtained from the control unit 21. .

Here, a configuration example of the size and arrangement determined by the screen configuration determination unit 25 and displayed on the display screen 19 is shown in FIG. Arrangement is performed according to the output size determined by the screen configuration determination unit 25. Here, when a recorded content video is output to a screen that is being worked on, the recorded content is reduced and displayed with a load reduction, and is displayed, for example, at an end on the output screen. The configuration example shown in FIG. 6 is an example in which the recorded content 19a is arranged at the upper right end of the screen, but the recorded content 19a may be arranged at any of the four corners or at any place on the four sides. . The place to be arranged can be selected by the user from a predetermined arrangement method.

Also, as shown in FIG. 6 (b), it is possible to specify the size of the content being recorded by the user's instruction (see 19b) and to change the display area as shown by an arrow. The user gives an instruction to change the size of the display 19a of the recorded content by operating the remote controller or the operation device 23 that can be dragged on the mouse or touch panel. At this time, the screen configuration determination unit 25 selects a new image size. For example, the amount of processing is reduced by removing the high frequency part of the horizontal frequency from the 16 × 16 DCT coefficients and performing inverse DCT processing using coefficients such as 8 × 8, 4 × 4, and 2 × 2. , Perform resolution conversion.

Further, as shown in FIG. 6C, even when the decoding process of only the I picture is performed, if the CPU load state exceeds a predetermined value, only the character program information 19c is displayed and the decoding is not performed.

Other than the load information obtained from the control unit, other considerations obtained from the control unit include the relationship between the screen resolution and the content display resolution. For example, when the resolution (pixel) of either the vertical or horizontal side after resolution conversion is lower than 1/8 of the display device with respect to the screen resolution of the display device, the character program information 19c (FIG. 6C) is displayed. The method of performing etc. can be considered.

Based on the arrangement information in the screen configuration determination unit 25, the output synthesis unit 17 synthesizes the output while reducing the load when decoding the content being recorded on a part of the screen, and outputs it together with the screen being worked on. Thus, it is possible to check the video currently being recorded without obstructing the screen display during work (for example, recording processing) and without increasing the load on the CPU.

Therefore, since the recorded video can be reproduced and confirmed with a small processing load while performing the recording process, the hardware scale is not increased and the power consumption for the process can be reduced.

Also, since the TS stream is saved, it can be displayed without losing image quality when viewed later.

(Second Embodiment)
FIG. 7 is a block diagram showing a second embodiment of the present invention, and is a functional block diagram showing a configuration example of a video processing apparatus. FIG. 8 is an example displayed on the display screen 19, and is a diagram showing a configuration example of the size and arrangement determined by the screen configuration determination unit in the present embodiment.

While the first embodiment has only one tuner unit, the present embodiment has a plurality of tuner units 3a to 3n, and includes a plurality of programs (including terrestrial digital broadcasting, BS, CS, etc.) Terrestrial digital broadcasting, including the case of having multiple tuners).

At this time, a broadcast signal of a specific frequency channel is selected based on the channel selection signal given from the control unit 21. Selection of each broadcast signal to be received is given from the user by a general operation device 23 effective for screen operations such as a remote controller, a mouse, and a touch panel.

The process of processing the obtained signal of each channel is to process the first embodiment in parallel, and the description of the same processing is omitted.

Here, a configuration example of the size and arrangement determined by the screen configuration determination unit 25 is shown in FIG. Arrangement is performed on the screen according to the output size determined by the screen configuration determination unit 25. Here, when the recorded content video is output to the screen in operation, the recorded content is reduced and displayed with a load reduction, and is displayed at the end on the output screen. The configuration example shown in FIG. 8A is an example in which a plurality of recorded contents are arranged vertically at the right end (19d). Similarly, the configuration example shown in FIG. 8B is an example in which a plurality of recorded contents are arranged horizontally at the lower end (19e). Further, as shown in FIG. 8C, a plurality of arrangements may be performed on each side in the vertical and horizontal directions (19f). Furthermore, the arrangement may be at any of the four corners, or at any place on the four sides. This is selected by the user from a predetermined arrangement method.

Also, as shown in FIG. 8D, it is possible to specify (change) the size of the content being recorded in accordance with a user instruction (19g shows a reduced state). The user gives an instruction to change the size by operating the remote controller or using the operation device 23 that can be dragged on a mouse or touch panel. At this time, the screen configuration determination unit 25 selects a new image size. For example, the amount of processing is reduced by removing the high frequency part of the horizontal frequency from the 16 × 16 DCT coefficients and performing inverse DCT processing using coefficients such as 8 × 8, 4 × 4, and 2 × 2. , Perform resolution conversion.

Also, the picture processing to be decoded is performed according to the processing in FIG. 4 as in the first embodiment. That is, even when displayed in the configuration example of each arrangement as shown in FIG. 8, the CPU load status has a predetermined value even when only I pictures are decoded, as in the first embodiment. In the case of exceeding, it is possible to display only the character program information as shown in FIG.

As described above, based on the arrangement information in the screen configuration determination unit 25, the output synthesis unit 17 synthesizes the output while reducing the load at the time of decoding the content being recorded on a part of the screen, and outputs it together with the working screen By doing this, it is possible to check the video currently being recorded without obstructing the screen display during work and without increasing the load on the CPU.

Further, as shown in FIG. 9, by arranging a hardware decoding circuit 51 capable of decoding one stream between the TS demultiplexer 9 and the output combining unit 17, the output combining unit 17 is working on the screen in FIG. 8. Therefore, it is possible to view all the content that the user wants to view and the content that is being recorded without imposing a load on the CPU.

Therefore, according to the present embodiment, recorded video can be played and confirmed with a small processing load while recording, so that the hardware scale is not increased and the power consumption for processing can be reduced. Is possible.

In the above-described embodiment, the configuration illustrated in the accompanying drawings is not limited to these, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

In addition, a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed. The “computer system” here includes an OS and hardware such as peripheral devices.

In addition, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.

Further, the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the above-described functions, or may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

The present invention can be applied to a video recording device (video processing device) including a tuner capable of receiving a television broadcast such as a terrestrial digital broadcast, a BS digital broadcast, or a CS broadcast. The video display device provided with the video recording device can be used for, for example, a digital television, a high-definition recorder, a personal computer equipped with a television tuner, and a portable terminal such as a mobile phone.

All publications, patents and patent applications cited in this specification shall be incorporated into the present specification as they are.

DESCRIPTION OF SYMBOLS A ... Image processing display apparatus, 1 ... Antenna, 3 ... Tuner part, 5 ... A / D converter, 7 ... Demodulator part, 9 ... TS demultiplexer, 11 ... Decoding process control part, 15 ... Decoder part, 17 ... Output composition , 21 ... control unit, 23 ... operating device, 25 ... screen configuration determination unit, 27 ... data storage unit, 31 ... demultiplexer, 33 ... variable length decoding unit, 35 ... inverse DCT unit, 39 ... decoding process control 39a, output frame determining unit, 39b, output size determining unit, 41 ... picture rearranging unit, 43 ... picture accumulating unit, 45 ... motion predicting unit, 47 ... adder.

Claims

In a video processing apparatus for recording a received video signal, a decoder unit that performs decoding processing of the video signal and a first screen display based on the video decoded by the decoder unit are provided on at least a part of the display device. A video processing apparatus having an output composition unit for performing composition for displaying an image together with a second screen display therein, and a control unit for controlling the whole;
A video processing apparatus, comprising: a decoding processing control unit that adjusts a processing load in the decoder unit of a video signal for performing the first screen display.
The video processing apparatus according to claim 1, wherein the decoding processing control unit includes an output frame determining unit that determines whether or not to perform decoding processing in units of picture types.
further,
The screen configuration determining unit according to claim 1, further comprising: a screen configuration determining unit configured to send a command for adjusting a picture type of the first screen display in a direction in which the load is reduced based on a load of the control unit to the output frame determining unit. 2. The video processing apparatus according to 2.
The decoding processing control unit includes an output size determining unit that performs video reduction or reduction of a decoding processing amount accompanying a reduction in video resolution in accordance with an output size or video resolution of the first screen display. The video processing apparatus according to claim 1 or 2.
5. The video processing apparatus according to claim 4, wherein the reduction of the processing load accompanying the reduction of the image resolution is a reduction of the processing load accompanying the reduction of the image resolution by low-frequency component inverse DCT processing.
5. The video processing apparatus according to claim 4, wherein a processing load associated with a reduction in the image resolution is reduced according to a resolution of the display apparatus.
further,
The apparatus according to claim 1, further comprising a screen configuration determination unit that sends a command to the output size determination unit to adjust a display size of the first screen display in a direction in which the load is reduced based on a load of the control unit. 5. The video processing apparatus according to 4.
A data storage unit that records a video signal before decoding by the decoder unit, and a switch that selectively outputs either the video signal being acquired or the video signal stored in the data storage unit to the decoding unit; 8. The video processing apparatus according to claim 1, wherein the video processing apparatus includes:
9. The video processing apparatus according to claim 8, wherein the received signal is recorded in the storage unit after a code amount is reduced by a designated method.
The decoding process with a reduced processing load for displaying the first screen is to reduce the processing load by decoding only a part of the moving image data in the received data. The video processing apparatus according to claim 1.
Part of the received data is motion compensated by a first frame that is two-dimensional compressed video data that is information-compressed in a frame and a first frame that is information-compressed in a temporally forward frame. In addition, the second frame, which is information-compressed three-dimensional compressed video data, and the three-dimensional compressed video data, which is information-compressed by adding motion compensation by the first frame or the second frame in the longitudinal direction in time. 9. The video according to claim 8, wherein the video is encoded data including a certain third frame mixedly, and processing load is reduced by decoding only a part of the moving image data. Processing equipment.
Whether the first screen display is to be performed on at least a part of the display device using the information of the content being recorded as characters or whether the image display is performed on at least a part of the display device is determined according to the processing load in the control unit The video processing apparatus according to claim 1, wherein the video processing apparatus is a video processing apparatus.
13. The video processing apparatus according to claim 12, wherein when the first image display is performed on at least a part of the display apparatus, a display having a resolution corresponding to a designated size is performed.
It has multiple tuner parts,
14. The recording apparatus according to claim 1, wherein recording is performed on a plurality of signals, and the first screen display is divided into a plurality of signals and is performed on at least a part of the display device. Video processing equipment.
15. The video processing apparatus according to claim 14, further comprising at least one hardware decoding circuit for displaying the second screen.
A step of decoding a received video signal;
Performing synthesis for displaying the first screen display based on the decoded video on at least a part of the display device together with the second screen display in operation,
And a decoding processing control step of adjusting a load of the decoding processing of the video signal for performing the first screen display.
A program for causing a computer to execute the method according to claim 16.