JP2008294630A - Picture recording/reproduction apparatus and control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a picture recording/reproducing apparatus which analyzes a video signal/audio signal to generate a control signal (correction value) of high precision and stores the generated control signal and the video signal/audio signal synchronously with each other and outputting the control signal at the same timing as the video signal/audio signal during reproduction, and is capable of correcting a scene of the video signal/audio signal by the control signal of high precision to output the scene. <P>SOLUTION: The apparatus includes a control signal generation means 5 which performs such control during recording that a video signal/audio signal SAV is stored into a storage part 4 and temporarily stored and analyzed to generate a control signal Sc and the control signal is stored synchronously with the video signal/audio signal SAV, and performs such control during reproduction that the video signal/audio signal SAV and the control signal Sc are read out at the same timing and the video signal/audio signal SAV is corrected on the basis of the control signal Sc. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus for recording video signals / audio signals of television broadcasting, DVD or VTR, and reproducing the video signals / audio signals. Recording / playback device that stores control signals such as contrast, gradation, backlight brightness, and volume based on the analysis result of the audio signal in synchronism and corrects and outputs the video signal / audio signal with the control signal during playback. And a control method thereof.

  The conventional technology has a recording / playback function built into the television receiver, records the video signal / audio signal of TV broadcast, DVD or VTR, plays back the recorded video signal / audio signal, and receives the television. What is displayed on the machine screen is known.

  FIG. 8 shows a block diagram of an example of a conventional television receiver incorporating a recording / playback function. In FIG. 8, a television receiver 50 receives video signals / audio signals from an input system 51, a video signal processing unit 52, and a video signal processing unit 52 to which video signals / audio signals of TV broadcasting, DVD or VTR are input. An output system 53 that outputs from a screen or a speaker, a signal writing unit 54 that writes a video signal / audio signal to a storage unit 56 that is a built-in recording / playback unit, and a signal reading unit 55 that reads a video signal / audio signal from the storage unit 56 And a storage unit 56 for storing a video signal / audio signal.

  The video signal / audio signal input from the input system 51 is processed by the video signal processing unit 52 during recording, and the processed video signal / audio signal is stored in the storage unit 56 via the signal writing unit 54, At the time of reproduction after a lapse of time, the stored video signal / audio signal is read out via the signal reading unit, output from the output system 53 via the video signal processing unit 52, and reproduced. become.

  The recording / playback function of the television receiver 50 shown in FIG. 8 is to record a video signal / audio signal simply (as it is) and play it back at a later date. Correspondingly, there is also a configuration in which an image, backlight brightness, sound quality, and the like are corrected and output in an optimal scene.

  For scene correction, video signals / audio signals are analyzed in real time, video signals / audio signals are corrected with the analyzed correction signals, video signals / audio signals are corrected in real time with prediction signals, etc. It has been.

  The prior art cited as Patent Document 1 discloses a technique for optimally correcting image quality (γ correction, color correction) in accordance with the state of a video signal that changes in real time. According to the technique of this patent document 1, it is said that the color to be corrected can be vividly corrected, and there is an effect that noise can be prevented from standing out even in a dark scene.

  Furthermore, in the prior art cited as Patent Document 2, when an extremely dark scene such as an image made from a movie film or the like continues, it is possible to detect the dark scene and set an image quality that is easier to see. Technology is disclosed. According to the technique of Patent Document 2, it is said that there is an effect that a scene with normal brightness and an extremely dark scene such as a movie film can be viewed with optimal image quality settings.

  In addition, in the prior art cited as Patent Document 3, digital video data recorded on a DVD is read in units of frames, and an average luminance value and a motion amount of pixels between frames are obtained to detect that a scene has changed. A technique for controlling to select a color palette corresponding to the average luminance value of the corresponding frame is disclosed. According to the technique of Patent Document 3, a digital video can always be reproduced with an optimal luminance value without the user himself / herself adjusting the luminance, and the luminance corresponding to each scene can be obtained regardless of whether the scene is dark or bright. It is said that it can provide high-quality images.

Furthermore, in the prior art cited as Patent Document 4, the amplitude of the video signal and the brightness of the backlight lamp are adjusted according to the scene. In a bright scene, the lamp is adjusted according to the change in the brightness of the scene. A technique is disclosed in which white peak luminance is improved by adjusting a control signal, and in a dark scene, the amplitude gain of a video signal is adjusted to improve contrast. According to the technique of Patent Document 4, it is said that there is an effect that the black peak is not lifted in a dark scene, the white peak is improved in a bright scene, and the power consumption can be further reduced.
JP 2006-270417 A JP 2000-78496 A JP 2000-115710 A Republished patent WO2003 / 075257

  Since the conventional technology analyzes the video signal / audio signal in real time, it takes time until the correction signal of the analysis result is generated, and it is delayed to the correction signal originally required for the scene of the video signal / audio signal. There is a problem that time is generated and the correction is shifted, and the quality expected of the image quality of the reproduced video signal / audio signal, the luminance of the backlight, the sound quality, and the like cannot be obtained.

  In addition, when a predicted value is adopted as a scene correction signal of a video signal / audio signal, a reproduced video signal / audio is reproduced when the predicted value matches an ideal correction signal of the scene of the video signal / audio signal. The image quality of the scene of the signal, the brightness of the backlight, the sound quality, etc. will be high quality. There is a possibility that the image quality of the scene of the signal / audio signal, the brightness of the backlight, the sound quality, etc. may be deteriorated.

  The present invention has been made to solve such a problem, and an object thereof is to analyze a scene of a video signal / audio signal, generate a control signal (correction signal) corresponding to the scene, and generate the control signal. And a video signal / audio signal stored in correspondence with each other, and during playback, a control signal is output at the same timing as the video signal / audio signal, and the video signal / audio signal scene is corrected with the control signal and reproduced. It is an object of the present invention to provide a recording / playback apparatus capable of improving the quality of a signal / audio signal and a control method thereof.

In order to solve the above problems, a recording / reproducing apparatus according to the present invention records a video signal / audio signal, and reproduces the video signal / audio signal in the recording / reproducing apparatus. The video signal / audio signal is temporarily stored and analyzed, a control signal corresponding to the scene of the video signal / audio signal is generated, and the control unit stores the control signal corresponding to the video signal / audio signal stored therein. And a control signal generating means for reading the video signal / audio signal and the corresponding control signal from the storage unit and correcting and outputting the video signal / audio signal based on the control signal during reproduction. To do.
The storage unit according to the present invention includes a video / audio signal storage area for storing video signals / audio signals and a control signal storage area for storing control signals.
Further, the control signal according to the present invention includes an active gamma control signal for correcting the contrast and gradation of the scene, an active BL control signal for correcting the brightness of the backlight, and an active audio power supply voltage control signal for correcting the power supply voltage of the audio output. It is characterized by being.
The control signal generation means according to the present invention temporarily stores and analyzes the video signal / audio signal to generate a control signal, and stores the generated control signal in the storage unit in correspondence with the video signal / audio signal. A signal analysis / processing unit, a backlight control unit that controls the luminance of the backlight based on the active BL control signal, a gamma control unit that controls the contrast and gradation of the scene based on the active gamma control signal, and active audio And an audio power supply voltage control unit that controls audio output based on a power supply voltage control signal.
In addition, it has a user adjustment unit that can adjust the contrast and gradation of the scene, the brightness of the backlight, and the power supply voltage for audio output. It also supports the user adjustment control signal from the user adjustment unit and the video / audio signals of the scene. And when storing the video signal / audio signal, the stored video signal / audio signal and the corresponding user adjustment control signal are recalled based on the user adjustment control signal. A user adjustment control unit for controlling the brightness of the light and the power supply voltage for audio output is provided.
The recording / reproducing apparatus control method according to the present invention is a recording / reproducing apparatus control method for recording a video signal / audio signal and reproducing the video signal / audio signal. A step of storing, a step of analyzing a scene of the video signal / audio signal, a step of generating a control signal based on the scene analysis, and a step of storing the control signal in association with the stored video signal / audio signal A step of reading out the stored video signal / audio signal and control signal at the time of reproduction, a step of correcting the video signal / audio signal based on the control signal, and a step of outputting the corrected video signal / audio signal. It is characterized by having.
The recording / playback apparatus control method according to the present invention further includes a step of generating an active gamma control signal, a step of generating an active BL control signal, and an active audio in the step of generating a control signal based on scene analysis. A step of generating a power supply voltage control signal is provided.
The recording / playback apparatus control method according to the present invention includes a step of correcting a video signal / audio signal based on a control signal, a step of correcting based on an active gamma control signal, and a step of correcting an active BL control signal. A correction step and a correction step based on an active audio power supply voltage control signal are provided.

  According to the present invention, since the video signal / audio signal to be corrected and the control signal (correction signal) are stored correspondingly, the correction is performed with the control signal (correction signal) corresponding to the video signal / audio signal to be reproduced. Therefore, the scene to be corrected can be corrected without a correction shift, and can be reproduced with high quality video and high quality audio.

  The present invention stores a video signal / audio signal of a television broadcast, DVD or VTR supplied from a television receiver in a storage unit such as a hard disk (HDD) during recording, and temporarily stores the video signal / audio signal. Then, the scene of the temporarily stored video signal / audio signal is analyzed, a control signal is generated based on the analysis result, and the generated control signal is associated with the already stored video signal / audio signal in the storage unit. Remember. During playback, a control signal is called from the storage unit at the same timing as the video signal / audio signal, and the scene reproduced by correcting the video signal / audio signal or backlight brightness, the power supply voltage of the audio signal amplifier, etc. It improves the quality and sense of presence. The control signal includes an active gamma control signal for correcting the contrast and gradation of the scene, an active BL (backlight) control signal for correcting the backlight brightness, and an active audio power supply voltage control signal for correcting the sound volume. There is.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram of a main part of an embodiment of a recording / playback apparatus applied to a television receiver according to the present invention. In FIG. 1, a recording / playback apparatus 1 includes a signal writing unit 2 that writes (stores) a video signal / audio signal SAV in a storage unit 4 during recording, and a video signal / audio stored in the storage unit 4 during playback. A signal reading unit 3 that reads out the signal SAV and the control signal (correction signal) Sc, a storage unit 4 that stores the video signal / audio signal SAV and the control signal Sc, and a control signal generation that controls the overall operation of the recording / playback apparatus 1 Means 5 are provided.

  The television receiver 10 includes a general input system 11, a video signal processing unit 12, and an output system 13. The input system 11 includes a receiving antenna that receives a television broadcast radio wave, a tuner that selects a desired channel from the received radio wave, an external signal input unit that receives a video signal / audio signal from an external device such as a DVD or VTR, An input switching unit that selects and outputs a signal from a tuner or an external signal input unit, a decoder, and the like are included.

  The video signal processing unit 12 performs interlaced and progressive conversion, generation of R (red), G (green), and B (blue) signals, multi-screen composition processing, and the like.

  The output system 13 includes an LCD controller that controls screen scanning of a liquid crystal panel, a liquid crystal panel that displays a video signal, a power amplifier circuit that amplifies an audio signal, a speaker that outputs an audio signal from the power amplifier circuit, and a power amplifier circuit A power supply for sound applied to the backlight, a backlight control unit for adjusting the brightness of the backlight, a cold cathode tube, a backlight for the LED, and the like.

  The control signal generation means 5 is basically composed of a microprocessor and controls the operation of the entire recording / playback apparatus 1.

  Further, the control signal generation means 5 performs control for storing the video signal / audio signal SAV in the storage unit 4 via the signal writing unit 2 during recording, and the video signal / audio signal input from the video signal processing unit 12. The SAV is temporarily stored and analyzed, the control signal Sc corresponding to the scene of the video signal / audio signal SAV is generated, and the control signal Sc is stored in the storage unit 4 in correspondence with the stored video signal / audio signal SAV. Execute control.

  Further, the control signal generation unit 5 reads out the video signal / audio signal SAV and the control signal Sc from the storage unit 4 at the same timing during reproduction, and executes control for correcting the video signal / audio signal SAV based on the control signal Sc. To do.

  At the time of recording, the video signal / audio signal SAV stored in the storage unit 4 and the video signal / audio signal SAV are temporarily stored in the control signal generation means 5, the scene is analyzed, and the control signal generated based on the analysis result A delay time required for scene analysis occurs with Sc.

  On the other hand, when the control signal Sc based on the scene analysis result is generated with a sufficiently long analysis time, the resolution is increased and the number of correction parameters is larger than when the control signal Sc is generated with a short analysis time in real time. And a highly accurate control signal can be obtained.

  However, when the corresponding video signal / audio signal SAV is corrected with the control signal Sc having a longer delay time than the scene of the video signal / audio signal SAV, a correction shift caused by the delay time occurs and the scene screen is not displayed. It becomes natural.

  Therefore, in the present invention, when the control signal Sc having the delay time is stored in the storage unit 4, the video signal / audio signal SAV without the delay time already stored in the storage unit 4 and the control signal Sc are stored in association with each other. To do. In order to store the video signal / audio signal SAV and the control signal Sc in correspondence with each other, the video signal / audio signal SAV and the time stamp from which the control signal Sc was analyzed are stored in the same time stamp, or the control signal Sc is stored. What is necessary is just to add the identifier which can identify 1: 1 correspondence with the video signal / audio | voice signal SAV used as the analysis origin. These time stamps and identifiers are referred to when reproducing the video signal / audio signal, and the correction is synchronized.

  At the time of reproduction, the control signal Sc corresponding to the scene of the video signal / audio signal SAV can be output from the storage unit 4 at the same timing, and the video signal / audio signal SAV is accurately (without time delay) by the control signal Sc. It can be corrected.

  FIG. 2 is a conceptual diagram of synchronization of the video signal / audio signal and the control signal according to the present invention. In FIG. 2, the control signal Sc is an active gamma control signal γc, and there is a delay time Td between the video signal / audio signal SAV stored in the storage unit 4 and the active gamma control signal γc generated by the control signal generation means 5. This represents a transition from a state to a state in which the active gamma control signal γc is stored in the storage unit 4 in association with the video signal / audio signal SAV stored in the storage unit 4.

  By synchronizing the active gamma control signal γc of the delay time Td with the video signal / audio signal SAV, the read timing of each frame of the active gamma control signal γc and the video signal / audio signal SAV to be corrected is stored so as to match. Part 4 can be stored. FIG. 2 shows how the frames of the active gamma control signal γc and the video signal / audio signal SAV to be corrected virtually coincide.

  Although the control signal Sc is described as the active gamma control signal γc, the active BL control signal BLc, which is a control signal for making the backlight brighter or darker (backlight luminance), or the volume of the speaker is increased, or The active audio power supply voltage control signal Vc, which is a control signal for lowering, can be similarly synchronized.

  Also, when the active gamma control signal γc, the active BL control signal BLc and the active audio power supply voltage control signal Vc are generated simultaneously, the timings of the three types of control signals γc, BLc and Vc can be adjusted by synchronizing all the signals. It can be matched with the video signal / audio signal SAV.

  Note that the active of the active gamma control signal γc, the active BL control signal BLc, and the active audio power supply voltage control signal Vc indicates that each control signal is not fixed, but is a variable control signal. The active gamma control signal γc can be controlled in units of frames, but the active BL control signal BLc and the active audio power supply voltage control signal Vc are genres of content by analyzing a plurality of frames by the signal analysis / processing unit 6. (Movie, sports, animation) is predicted, and the active BL control signal BLc and / or active audio power supply voltage control signal Vc optimum for the content is set in common for all frames, or the change of the video signal / audio signal SAV, for example, Only large (scene change) frames are set to different settings. It is.

  Here, the storage unit 4 that stores the video signal / audio signal SAV and the control signal Sc will be described. FIG. 3 is an image diagram of an embodiment of a storage unit according to the present invention. In FIG. 3, the storage unit 4 includes a video / audio signal storage area 4a for storing a video signal / audio signal SAV and a control signal storage area 4b for storing a control signal Sc.

  The video / audio signal storage area 4a stores a video signal / audio signal SAV of a video signal / audio signal of a television broadcast, a DVD or a VTR.

  In the control signal storage area 4b, control signals Sc corresponding to video signals / audio signals SAV of TV broadcast, DVD or VTR, for example, active gamma control signal γc, active BL control signal BLc and active audio power supply voltage control signal Vc. Remember. The control signal storage area 4b also stores a maximum brightness control signal, a minimum brightness control signal, an average brightness control signal, a maximum sound control signal, a minimum sound control signal, or a brightness change control signal.

  Thus, since the storage unit 4 includes the control signal storage area 4b, various control signals Sc are stored in synchronization with the video signal / audio signal SAV, and at the same time as the video signal / audio signal SAV during reproduction. The control signal Sc can be output and corrected with high accuracy without causing a correction shift of the video signal / audio signal SAV.

  Returning to FIG. 1, the control signal generation means 5 temporarily stores and analyzes the video signal / audio signal SAV to generate the control signal Sc, and stores the generated control signal Sc in synchronization with the video signal / audio signal SAV. The signal analysis / processing unit 6 stored in the unit 4, the backlight control unit 7 for controlling the luminance of the backlight based on the active BL control signal BLc, and the contrast and gradation of the scene based on the active gamma control signal γc A gamma control unit 8 for controlling and an audio power supply voltage control unit 9 for controlling audio output based on the active audio power supply voltage control signal Vc are provided. Here, the control signal Sc is a correction signal including an active gamma control signal γc, an active BL control signal BLc, and an active audio power supply voltage control signal Vc.

  Further, the signal analysis / processing unit 6 reads out the video signal / audio signal SAV from the storage unit 4 (video / audio signal storage area 4a) and supplies it to the video signal processing unit 12 via the signal reading unit 3 during reproduction. Take control.

  Further, the signal analysis / processing unit 6 reads the control signal Sc from the storage unit 4 (control signal storage region 4b) during reproduction, and supplies the active BL control signal BLc to the backlight control unit 7, and the backlight control unit 7 Is controlled to correct the luminance of the backlight of the output system 13 according to the scene.

  Further, the signal analysis / processing unit 6 supplies the active gamma control signal γc to the gamma control unit 8 at the time of reproduction, controls the operation of the gamma control unit 8, and sends the active gamma control signal γc to the video signal processing unit 12. A corresponding signal is supplied, and the contrast of the scene and the image quality of the gradation of the video signal / audio signal SAV are corrected. For example, the content genre (movie, sports, animation) is predicted by analyzing a plurality of frames by the signal analysis / processing unit 6, and the contrast, gradation, or scene change is performed depending on the genre such as movies, sports, animation, etc. By detecting, the contrast and gradation of the corresponding frame are set.

  Further, the signal analysis / processing unit 6 supplies the active audio power supply voltage control signal Vc to the audio power supply voltage control unit 9 and controls the operation of the audio power supply voltage control unit 9 to control the voltage of the audio power supply of the output system 13. Adjust to match the scene. For example, when the sound level is low, it is determined to increase the power supply voltage of the sound signal amplifier.

  In the present embodiment (recording / playback apparatus 1) shown in FIG. 1, the control signal Sc (active gamma control signal γc, active BL control signal BLc and active audio power supply voltage control signal Vc) is added to the scene of the video signal / audio signal SAV. Although standard high-accuracy correction is performed using the, there is a demand for further correction according to user preference. Next, a case where the video signal / audio signal SAV is corrected according to the user's preference will be described.

  FIG. 4 is a block diagram of the main part of another embodiment of the recording / playback apparatus applied to the television receiver according to the present invention. In FIG. 4, the recording / playback apparatus 14 includes a signal writing unit 2, a signal reading unit 3, a storage unit 15, a control signal generation unit 16, a user adjustment control unit 18, and a user adjustment unit 17.

  Note that the recording / playback device 14 includes a user adjustment unit 17 that adjusts the control signal Sc according to user preferences, a point that the user adjustment control signal UTc is additionally stored in the control signal storage area 4b of the storage unit 15, and The configuration is the same except that the user adjustment control unit 18 is added to the control signal generation unit 16 except that the recording / playback apparatus 1 is different.

  The user adjustment unit 17 is operated when the user adjusts the scene contrast and gradation of the video signal / audio signal SAV, the luminance of the backlight, the power supply voltage of the audio output, and the like according to the preference. Is entered.

  Information input to the user adjustment control unit 18 is stored in the control signal storage area 4b of the storage unit 15 as a user adjustment control signal UTc together with an active gamma control signal γc, an active BL control signal BLc, and an active audio power supply voltage control signal Vc. Remembered.

  The user adjustment control unit 18 of the control signal generating unit 16 is configured to generate an active gamma control signal γc and an active BL control signal BLc based on the user adjustment control signal UTc stored in the control signal storage area 4b of the storage unit 15 during reproduction. Then, the standard contrast and gradation image quality corrected by the active audio power supply voltage control signal Vc, the luminance of the backlight, and the power supply voltage of the audio output are further corrected in accordance with the user's preference.

  The image quality, backlight luminance, and volume are corrected according to the user's preference, but it is also possible to correct maximum luminance, minimum luminance, average luminance, maximum audio, minimum audio, or luminance change.

  As described above, the recording / playback apparatus 14 can correct the image quality, the backlight luminance, and the volume according to the user's preference in addition to the standard correction, and can appeal the improvement in convenience.

  As described above, according to the recording / playback apparatus 1, the scene of the video signal / audio signal SAV can be corrected with the high-precision control signal Sc at the same timing, and the scene of the video signal / audio signal SAV can be corrected with high quality. It can be played back with video and high quality audio.

  In the above embodiment, the recording / playback apparatus applied to the television receiver has been described. However, the present invention can also be realized by a single recording / playback apparatus.

  Next, a method for controlling the recording / playback apparatus will be described. FIG. 5 is an operation flowchart of the main part of one embodiment of the control method of the recording / playback apparatus according to the present invention.

  First, in step S1, the video signal / audio signal is stored in the video / audio signal storage area 4a, and at the same time, stored in the signal analysis / processing unit 6 for signal analysis.

  Next, the signal analysis / processing unit 6 analyzes the scene of the video signal / audio signal (step S2).

  Subsequently, the signal analysis / processing unit 6 generates a control signal Sc based on the scene analysis (step S3). In step S3, a control signal is generated based on the scene analysis.

  Next, the signal analysis / processing unit 6 stores the control signal Sc in association with the video signal / audio signal stored in the video / audio signal storage area 4a (step S4). Steps S1 to S4 are an operation flow during recording.

  Next, when reproducing the recorded video signal / audio signal, the stored video signal / audio signal and control signal Sc are first read (step S5).

  In step S6, the video signal / audio signal is corrected based on the read control signal Sc.

  In step S7, the corrected video signal / audio signal is output. Steps S5 to S7 are an operation flow during reproduction.

  FIG. 6 shows step S3 of FIG. 5 in more detail, and step S3 includes sub-steps SUB1 to SUB3. In substep SUB1, an active gamma control signal γc is generated.

  In substep SUB2, an active BL control signal BLc is generated.

  In substep SUB3, an active audio power supply voltage control signal Vc is generated.

  FIG. 7 is a supplementary operation flowchart of another embodiment of the recording / playback apparatus control method according to the present invention. FIG. 7 shows step S6 of FIG. 5 in more detail, and step S6 includes sub-steps SUB4 to SUB6. In sub-step SUB4, the video signal is corrected based on the active gamma control signal γc.

  In sub-step SUB5, the video signal and the brightness of the backlight are corrected based on the active BL control signal BLc.

  In sub-step SUB6, the output voltage of the audio signal amplifier power supply is corrected based on the active audio power supply voltage control signal Vc.

  In addition, although corrected based on the active gamma control signal γc, the active BL control signal BLc, and the active audio power supply voltage control signal Vc, the maximum luminance control signal, the minimum luminance control signal, the average luminance control signal, the maximum audio control signal, You may make it correct | amend based on the minimum audio | voice control signal or a brightness change control signal.

  Active of the active gamma control signal γc, the active BL control signal BLc, and the active audio power supply voltage control signal Vc indicates that each control signal is not a fixed but variable control signal.

  Thus, according to the control method of the recording / playback apparatus, the scene of the video signal / audio signal SAV can be corrected with the high-precision control signal Sc at the same timing.

  The present invention takes a sufficient amount of time to analyze a scene of a video signal / audio signal, generates a highly accurate control signal (correction value), and stores the generated control signal and the video signal / audio signal in synchronization. During playback, a control signal can be output at the same timing as the video signal / audio signal, and the scene of the video signal / audio signal can be corrected and output with a high-precision control signal, which can be applied to any recording / playback device. be able to.

1 is a block diagram of a main part of an embodiment of a recording / playback apparatus applied to a television receiver according to the present invention. It is an image figure of a synchronization of a video signal / audio signal and a control signal according to the present invention. It is an embodiment image figure of the memory | storage part concerning this invention. FIG. 10 is a block diagram of a main part of another embodiment of a recording / playback apparatus applied to a television receiver according to the present invention. It is an operation | movement flowchart of the principal part of one Embodiment of the control method of the video recording / reproducing apparatus concerning this invention. It is a supplementary operation | movement flowchart of one Embodiment of the control method of the video recording / reproducing apparatus concerning this invention. It is a supplementary operation | movement flowchart of another embodiment of the control method of the video recording / reproducing apparatus based on this invention. It is an example block block diagram of the television receiver which incorporated the conventional video recording / reproducing function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,14 ... Recording / playback apparatus 2 ... Signal writing part 3 ... Signal reading part 4,15 ... Storage part 4a ... Video / audio signal storage area 4b ... Control signal storage area 5,16 ... Control signal generating means 6 ... Signal analysis Processing unit 7 Backlight control unit 8 Gamma control unit 9 Audio power supply voltage control unit 10 Television receiver 11 Input system 12 Video signal processing unit 13 Output system 17 User adjustment unit 18 User adjustment Control unit SAV ... Video signal / audio signal Sc ... Control signal BLc ... Active BL control signal γc ... Active gamma control signal Vc ... Active audio power supply voltage control signal Td ... Delay time UTc ... User adjustment control signal

Claims (8)

In a recording / reproducing apparatus for recording a video signal / audio signal and reproducing the video signal / audio signal,
At the time of recording, the video signal / audio signal is stored in a storage unit, the video signal / audio signal is temporarily stored and analyzed, a control signal corresponding to a scene of the video signal / audio signal is generated, and the control signal Is stored in the storage unit corresponding to the video signal / audio signal stored,
Control signal generating means for reading the video signal / audio signal and the corresponding control signal from the storage unit during reproduction, and correcting and outputting the video signal / audio signal based on the control signal. Recording / playback device. 2. The recording / playback apparatus according to claim 1, wherein the storage unit includes a video / audio signal storage area for storing the video signal / audio signal and a control signal storage area for storing the control signal. The control signal is an active gamma control signal for correcting the contrast and gradation of the scene, an active BL control signal for correcting the brightness of the backlight, and an active audio power supply voltage control signal for correcting the power supply voltage of the audio output. The recording / playback apparatus according to claim 1, wherein the recording / playback apparatus is characterized. The control signal generation means temporarily stores and analyzes the video signal / audio signal to generate the control signal, and stores the generated control signal in the storage unit in association with the video signal / audio signal A signal analysis / processing unit, a backlight control unit that controls the luminance of the backlight based on the active BL control signal, and a gamma control unit that controls the contrast and gradation of the scene based on the active gamma control signal; The voice power supply voltage control part which controls a voice output based on the said active voice power supply voltage control signal is provided, The claim 1 characterized by the above-mentioned. Recording and playback device. A user adjustment unit capable of adjusting the contrast and gradation of the scene, the luminance of the backlight, and the power supply voltage of the audio output, and a user adjustment control signal from the user adjustment unit and the video signal / audio signal of the scene Storage means for storing correspondingly;
When the video signal / audio signal is reproduced, the stored video signal / audio signal and the user adjustment control signal corresponding to the stored video signal / audio signal are called, and the contrast, gradation, and backlight luminance are based on the user adjustment control signal. A user adjustment control unit for controlling the power supply voltage of the audio output;
5. The recording / reproducing apparatus according to claim 1, wherein the recording / playback apparatus comprises: In a control method of a recording / reproducing apparatus for recording a video signal / audio signal and reproducing the video signal / audio signal,
Storing video / audio signals during recording;
Analyzing the scene of the video / audio signal;
Generating a control signal based on the scene analysis;
Storing the control signal in correspondence with the stored video / audio signal;
Reading the stored video signal / audio signal and the control signal during reproduction;
Correcting the video signal / audio signal based on the control signal;
Outputting the corrected video / audio signal;
A control method for a recording / playback apparatus, comprising: In the step of generating a control signal based on the scene analysis,
Generating an active gamma control signal;
Generating an active BL control signal;
Generating an active voice power supply voltage control signal;
7. The method for controlling a recording / reproducing apparatus according to claim 6, further comprising: In the step of correcting the video signal / audio signal based on the control signal,
Correcting based on the active gamma control signal;
Correcting based on the active BL control signal;
Correcting based on the active voice power supply voltage control signal;
The method for controlling a recording / reproducing apparatus according to claim 6, further comprising:

Images