JP2006295480A - Audio-visual recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio-visual recording/reproducing device which is capable of recording images in which actual image information components whose aspect ratios are set different from formation aspect ratios are displayed on a center by recording the images as center images excluding lateral sides of the images where no information is present when the images which are formed into other images having different aspect ratios and whose actual image information components are displayed at a center are recorded, and capable of displaying the images on a full screen independently of functions and setting accompanying a reproduction device when the images are reproduced using a monitor device having the same aspect ratio as that of the actual image information component. <P>SOLUTION: In the audio-visual recording/reproducing device which records the images and voices of television broadcasting etc, and reproduces them as shown in figure 1, when images whose actual image components have aspect ratios 4:3 and which have image aspect ratios of 16 to 9 are recorded, only a part of the image which is actually displayed is recorded as an image having an aspect ratio of 4 to 3 in recording media 3, 5, and 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a video / audio recording / reproducing for recording / reproducing video / audio such as a television broadcast for recording an image having an aspect ratio of 4: 3 in spite of a video aspect ratio of 16: 9. It relates to the device.

Conventionally, in a combined device of a hard disk device and a DVD device, a device capable of recording HD (digital high-definition) broadcasts such as BS digital broadcasts on a hard disk and a DVD has been proposed, or a cross-sectional operation straddling the hard disk device and the DVD device. It is known to propose a device that realizes various functions and improves usability (see, for example, Patent Documents 1 to 9).
In Patent Document 1 out of Patent Documents 1 to 9, a digital broadcast tuner 1 that receives a digital high-definition broadcast, a hard disk controller and a DVD controller that record and reproduce an output signal from the digital broadcast tuner, and a digital high-definition (HD) And an HD-SD converter for converting the signal into a digital standard (SD) signal.
FIG. 8 is a schematic diagram showing a digital high-definition (HD) signal that is 16: 9 video. FIG. 9 is a schematic diagram showing that the actual video information portion is created at an aspect ratio of 4: 3 even though the video aspect ratio is created at a ratio of 16: 9. FIG. 10 is a schematic diagram showing that only the range in which an image is displayed is recorded as an image having an aspect ratio of 4: 3, except for the black (black) portion where there is no left and right information in FIG.
Conventionally, as this type of device, for example, devices as disclosed in Patent Documents 1 to 9 have been disclosed. This is mainly a technique related to recording by converting a digital high-definition (HD) signal having an aspect ratio of 16: 9 as shown in FIG. 8 into a digital standard (SD) signal.
As shown in FIG. 9, the actual video information portion is created at an aspect ratio of 4: 3 even though the video is created at a video aspect ratio of 16: 9. In Patent Document 1, when recording this video, only the range in which the video is displayed is recorded as a video with an aspect ratio of 4: 3 as shown in FIG. Is not disclosed.
If it is assumed that a monitor device with an aspect ratio of 4: 3 is used, the video recorded as an aspect ratio of 16: 9 is used for playback on the entire screen without changing the video as shown in FIG. In order to do this, it is necessary to be able to perform pan / scan mode playback by setting on the playback device side such as a DVD recorder.
The pan / scan mode is a mode in which a video image having an aspect ratio of 16: 9 is reproduced in a state where both sides of the screen are cut off on a display device having an aspect ratio of 4: 3. This means a mode in which only the central portion in FIG. 11 below is displayed on the entire display device having an aspect ratio of 4: 3.

FIG. 11 is a schematic diagram for explaining a state in which only the center portion of the video is displayed with the left and right portions cut off. Even if the playback device has the above-described function, when a video with an actual video aspect ratio of 16: 9 is played back with this mode set, the center of the video is cut off with the left and right portions cut off. Only the part will be displayed. That is, there is a portion where there is an image but it is not displayed.
FIG. 12 is a schematic diagram for explaining a state in which all video portions are reproduced. In order to prevent the display as shown in FIG. 11, there is a method of setting the playback device in a mode (letterbox) with bands on the top and bottom.
JP 2004-159225 A JP 2002-165186 A Japanese Patent No. 3551921 JP 2002-216427 A JP 2002-335463 A JP 2002-354354 A JP 2003-169299 A JP 2004-159085 A JP 05-344495 A

However, according to this method, when an image having an actual image aspect ratio of 16: 9 is reproduced, all the portions are reproduced as shown in FIG. 12, but the actual image as shown in FIG. When the information portion records and reproduces a video having an aspect ratio of 4: 3, the following problem occurs.
FIG. 13 is a schematic diagram for explaining an image with an aspect ratio of 4: 3, which is displayed small in the center of the screen. When an actual video information portion as shown in FIG. 9 is recorded and played back with an aspect ratio of 4: 3, the actual video information portion is displayed small in the center portion of the screen as shown in FIG. End up.
Therefore, in order to play back in an optimal state, the user must switch the setting according to the type of recorded video information using a playback device having a pan / scan mode playback function, and the operation is complicated. There was a problem of becoming.
Therefore, in view of the above situation, an object of the present invention is to record a video having a different aspect ratio and an actual video information portion displayed in the center portion as shown in FIG. By recording the image of the center part except for the part without the left and right information, the actual image information part different from the created aspect ratio is recorded in the center part, and the aspect ratio of the actual image information part is recorded. It is an object of the present invention to provide a video / audio recording / reproducing apparatus that can always display the video on a full screen regardless of the functions and settings associated with the reproducing apparatus when reproducing using the monitor apparatus.

In order to solve the above problems, the invention according to claim 1 is an image / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcasting, wherein an aspect ratio of an actual video portion is 4: 3. A video / audio recording / reproducing apparatus that records only a portion where video is actually displayed on a recording medium as a video having an aspect ratio of 4: 3 when recording a video having a video aspect ratio of 16: 9. .
The invention according to claim 2 is characterized in that the video / audio recording / reproducing apparatus according to claim 1 uses an optical disk as the recording medium.
According to a third aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the first aspect, wherein a hard disk is used as the recording medium.
According to a fourth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the first aspect, wherein a memory card is used as the recording medium.
According to a fifth aspect of the present invention, in the video / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcasting, the aspect ratio is 16: 9 and the actual video portion has an aspect ratio of 4: 3. A video / audio recording / reproducing apparatus for recording on the optical disc as a video having an aspect ratio of 4: 3 only when the video is actually displayed from the hard disk recording the video to the optical disc. And
According to a sixth aspect of the present invention, in the video / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcasting, the aspect ratio is 16: 9 and the aspect ratio of the actual video portion is 4: 3. When recording this video from the hard disk recording the video to the memory card, the video / audio recording / playback is performed by recording only the portion where the video is actually displayed on the memory card as the video having the aspect ratio of 4: 3. Features the device.
According to a seventh aspect of the present invention, in a video / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcast, the video aspect ratio is 16: 9 among the video of a predetermined time recorded on the hard disk. In spite of the fact that an image having an aspect ratio of 4: 3 and an image having an actual aspect ratio of 16: 9 are dubbed onto an optical disc, the aspect ratio is 4 The video / audio recording / reproducing apparatus records the central portion as a 4: 3 aspect ratio video on the optical disc for all video images for a certain time when the ratio of 3: 3 exceeds a certain ratio.
According to an eighth aspect of the present invention, in a video / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcasting, the video aspect ratio is 16: 9 among the video of a predetermined time recorded on the hard disk. In spite of the fact that the aspect ratio of the actual video portion is 4: 3 and the video where the actual aspect ratio is 16: 9 is dubbed to the memory card, the aspect ratio is A video / audio recording / reproducing apparatus that records the central portion as a 4: 3 aspect ratio video on the memory card for all video for a certain time when the 4: 3 portion exceeds a certain ratio. .

  According to the present invention, even when a video aspect ratio is created at a ratio of 16: 9, an actual video information part is a video recorded with a video having an aspect ratio of 4: 3. However, the video can always be displayed on the full screen regardless of the functions and settings of the playback device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a video / audio recording / reproducing apparatus according to the present invention. In FIG. 1, a television tuner (monitor device) 2 is connected to the control unit 1 of the video / audio recording / reproducing apparatus.
Recording of video / audio from the TV tuner 2 or an externally input video / audio signal is MPEG2, H.264, or H.264. This is performed on the memory card 6 such as the optical disk 3, the hard disk 5 and the PC card, the compact flash (registered trademark) card, the SD memory card, the multimedia card, and the memory stick using a compression method such as H.264 / AVC.
In addition, the video / audio recorded in each of these recording media is also reproduced. FIG. 1 further shows an operation unit 4, an optical disk drive 9 that drives the optical disk 3, a hard disk drive 7 that drives the hard disk 5, and a memory card reading / writing device 8 that reads and writes to the memory card 6. .
FIG. 2 is a block diagram showing a configuration of a control unit of a video / audio recording / reproducing apparatus for analog television broadcasting. In the figure, the CPU 10 controls the entire apparatus by a program. The connected memory 11 is used as a work area, and the flash ROM 12 stores a control program.
The analog TV tuner 13 receives analog TV broadcast waves and generates analog video signals and audio signals. The audio signal generated by the analog TV tuner 13 is converted into a digital audio signal by the A / D converter 14 and then input to the video decoder / interface LSI 15.
Although not shown, the video signal generated by the analog TV tuner 13 is appropriately converted into a digital signal, input to the determination unit 16, processed as necessary, and then input to the MPEG encoder 17. The audio signal passes through the determination unit 16 as it is and is input to the MPEG encoder 17.
The stream controller 18 has an interface such as IDE, ATAPI, or USB. Thereby, the stream controller 18 outputs the video / audio data encoded by the MPEG encoder 17 to the storage device 19 such as a connected hard disk drive, optical disk drive, memory card reading / writing device or the like under the control of the CPU 10.
Further, at the time of reproduction, reading processing from each storage device 19 is performed. At the time of reproduction, the video / audio data read from the storage device 19 is decoded by the MPEG decoder 20. The decoded video / audio signal is converted into an analog video signal and an analog audio signal that can be displayed on a monitor or the like via an analog video / audio signal generation LSI 21.
The memories 22, 23 and 24 connected to the MPEG encoder 17, the MPEG decoder 20 and the stream controller 18 are used as work areas of the MPEG encoder 17, the MPEG decoder 20 and the stream controller 18, respectively. The determination unit 16 is connected to a frame memory 25 that captures video information.

FIG. 3 is a block circuit diagram showing a configuration example of the control unit of the video / audio recording / reproducing apparatus corresponding to both analog television broadcasting and digital television broadcasting. In FIG. 3, the CPU 10 controls the entire apparatus by a program. The connected memory 11 is used as a work area, and the flash ROM 12 stores a control program.
The analog TV tuner 13 receives analog TV broadcast waves and generates analog video signals and audio signals. The audio signal generated by the analog TV tuner 13 is converted into a digital audio signal by the A / D converter 14 and then input to the video decoder / interface LSI 15.
The stream controller 18 has an interface such as IDE, ATAPI, or USB. The stream controller 18 converts stream data having video / audio information under the control of the CPU 10, and converts the converted stream data and the video / audio data encoded by the MPEG encoder 17 to a connected hard disk drive or optical disk drive. The data is output to the storage device 19 such as a memory card reading / writing device. Further, at the time of reproduction, reading processing from the storage device 19 is performed.
Memories 22, 23 and 24 connected to the MPEG encoder 17, MPEG decoder 20 and stream controller 18 are used as work areas of the MPEG encoder 17, MPEG decoder 20 and stream controller 18, respectively. The determination unit 16 is connected to a frame memory 25 that captures video information.

In the recording of the digital television broadcast, the digital television tuner 26 receives the digital television broadcast radio wave and generates stream data including digital video data and audio data from the digital television broadcast radio wave. From the generated stream data, only a stream including video information to be recorded is selected by the stream controller 18, and is sent and recorded in the storage device 19.
When digital TV broadcast is reproduced as video / audio recorded directly without performing resolution conversion or the like, after the stream data is read from the storage device 19 via the stream controller 18 and decoded by the MPEG decoder 20, It is converted into an analog video signal and an analog audio signal that can be displayed on a monitor or the like via the analog video / audio signal generation LSI 21.
The recording / reproduction of the analog television broadcast is the same as in FIG. In the case of recording video after converting HD stream data obtained by directly recording a digital television broadcast to a resolution suitable for an optical disc medium such as a DVD, the stream data is read from the storage device 19 via the stream controller 18.
The video / audio data decoded by the MPEG decoder 20 is input to the determination unit 16 and processed as necessary, and then input to the MPEG encoder 17. The audio signal passes through the determination unit 16 as it is and is input to the MPEG encoder 17.
The input video / audio data is re-encoded so as to have a resolution / format suitable for an optical disk such as a DVD or a medium such as a memory card, and then output to the storage device 19 via the stream controller 18 again.

FIG. 4 is a diagram schematically showing a portion corresponding to a luminance signal in the frame memory usage method shown in FIGS. Referring to FIGS. 2 to 4, each numeral in FIG. 4 indicates the luminance value assigned in 256 stages from 0 to 255 when the video is digitized by the video decoder / interface LSI 15. The state stored in is shown.
When the determination is made based on the area a in FIG. 4, the determination unit 16 sets the value in the frame memory 25 from 0 × 0000h to 0 × 0002h, 0 × 0010h to 0 × 0012h, 0 × The value obtained by dividing the value from address 0020h to address 0 × 0022h, and the same sum of values from address 0 × 0070h to address 0 × 0072h by the number of target pixels (24 in this example) is a constant value ( For example, it is determined that the video has an aspect ratio of 4: 3 with an aspect ratio of 16: 9. If the value exceeds the value, the video is determined to have an original aspect ratio of 16: 9.
FIG. 5 is a diagram schematically showing a state of the frame memory in which luminance information is accumulated after a lapse of a certain time (for example, after 5 seconds) from the time of FIG. Referring to FIGS. 2 to 5, determination unit 16 compares the value at address 0 × 0000h shown in FIG. 4 in frame memory 25 with the value at address 0 × 1000h shown in FIG. Next, a comparison is made between the value at address 0x0001h and the value at address 0x1001h.
Next, the contents of the addresses 0 × 0007h and 0 × 1007h are compared with each other by comparing the values of the addresses 0 × 0002h and 0 × 1002h, and all match or 0 × 0000h. The absolute value obtained by subtracting the value of the address 0x1000h from the address value, the absolute value obtained by subtracting the value of the address 0x1001h from the value of the address 0x0001h, and so on. The absolute value obtained by subtracting the value at the address 1070h is taken.
If the value obtained by dividing those totals by the number of pixels is less than or equal to a certain value (for example, 5 or less), the screen is stationary. If it exceeds a certain value, it is determined that the screen is not stationary.
In addition, as described above, the pan / scan mode is a mode in which, when a video having an aspect ratio of 16: 9 is reproduced on a display device having an aspect ratio of 4: 3, both sides of the screen are cut off. This means a mode in which only the central portion in FIG. 11 is displayed on the entire display device having an aspect ratio of 4: 3.
The video / audio recording / reproducing apparatus reproduces a video in which an actual video information portion is recorded with a video having an aspect ratio of 4: 3 even though the video aspect ratio is created at a ratio of 16: 9. Even if it exists, it becomes possible to always display on a full screen irrespective of the function and setting which a reproducing | regenerating apparatus has.

FIG. 6 is a flowchart showing an outline of the operation of the determination unit in FIGS. 2 and 3 in the control unit related to the recording start instruction of the present invention. Referring to FIGS. 2 to 6, when recording is started, the video information is taken into frame memory 25 (S1), the video data in frame memory 25 is analyzed, and the aspect ratio of the video to be recorded is recorded. Is 16: 9 or 4: 3 (S2).
If the aspect ratio is 4: 3, the subsequent processing is not performed and the output is directly output to the MPEG encoder 17 (S3). When the aspect ratio is 16: 9, for example, the luminance data of the data corresponding to the left (or right) portion of the screen among the data temporarily stored in the frame memory 25 is analyzed.
By this analysis, determination is made based on a determination criterion such that 90% or more of them are determined to be black, or the corresponding portion is not monochromatic but is still for 3 seconds or more (S4).
If it is determined that the aspect ratio is 4: 3 video with the aspect ratio of 16: 9 as shown in FIG. 9 described in the preceding sentence, only video data corresponding to the center portion of the screen is displayed as the aspect ratio 4: 3 video. Is output to the MPEG encoder 17 as an aspect ratio 4: 3 video as shown in FIG. 10 described in the preceding sentence (S5). Next, it is determined whether there is a recording end instruction (S6). If there is an instruction, the operation is ended.
As a result of the analysis, if it is determined that the original 16: 9 video as shown in FIG. 8 described in the preceding sentence is obtained, the subsequent processing is not performed and the output is directly output to the MPEG encoder 17 (S3). The above processing is continued until a recording end instruction is issued.

FIG. 7 is a flowchart showing an outline of the operation of the determination unit in FIG. 3 in the control unit related to the dubbing start instruction of the present invention. With reference to FIG. 3 and FIG. 7, an instruction to convert the resolution of the HD video stored in the hard disk 19 and dubbing to a storage medium such as a hard disk, an optical disk such as a DVD, or a memory card is started.
In this case, video for a predetermined time (one program or one title) stored in the hard disk 19 is taken into the frame memory 25 of the determination unit 16 in a form such as one frame every minute. (S11).
Each video data in the frame memory 25 is analyzed, and it is determined whether the aspect ratio of the video to be recorded is 16: 9 or 4: 3 (S12). If the aspect ratio is 4: 3, the setting of the determination unit 16 is fixed so that the subsequent processing is not performed and the through output is output to the MPEG encoder 17 as it is (S13).
When the aspect ratio is 16: 9, each video data in the frame memory 25 is analyzed, and the ratio of 4: 3 aspect ratio video with aspect ratio 16: 9 is included in the video to be recorded. (S14).
Of these video data, for example, the luminance data of the data corresponding to the left (or right) part of the screen is analyzed, and when 90% or more of the data is determined to be black or the corresponding part is not a single color. Regardless of the criteria, such as standing still for more than 3 seconds.
When the aspect ratio 4: 3 video with the aspect ratio of 16: 9 has a constant ratio (for example, 80% or more) in a certain time (one program or one title), the aspect ratio 4: 3 video is displayed only in the center portion. The mode of the determination unit 16 is fixed so as to be output to the MPEG encoder 17 (S15).
When the ratio is less than a certain ratio, for example, less than 20% or all match with the original aspect ratio 16: 9 video, the determination unit 16 outputs through as it is so as to output all as the aspect ratio 16: 9 video. (S13). Thereafter, the dubbing process is performed (S13), and the fixing of the determination unit 16 is released after the dubbing process is completed.

The video / audio recording / playback apparatus according to the present invention is a video whose actual video information portion has an aspect ratio of 4: 3 even though the video aspect ratio recorded on the hard disk is created at a ratio of 16: 9. Even when a dubbed video is played, the video can always be displayed on the full screen regardless of the functions and settings of the playback device.
Also, the video / audio recording / playback apparatus according to the present invention has an aspect ratio of 4: 3 in the actual video information portion even though the video aspect ratio recorded on the hard disk is created at a ratio of 16: 9. And a video in which a video having an aspect ratio of 16: 9 is mixed within a certain time (one program or one title) is recorded.
In this case, since the aspect ratio does not change in the middle of the video, the aspect ratio is important for the user even when recording on a recording medium in which the aspect ratio cannot be changed in the middle of one recording unit. 4: 3 video can be displayed on the full screen.

1 is a schematic configuration diagram showing an embodiment of a video / audio recording / reproducing apparatus according to the present invention. It is a block diagram which shows the structure of the control part of the video / audio recording / reproducing apparatus for analog television broadcasting. It is a block circuit diagram which shows the structural example of the control part of the video / audio recording / reproducing apparatus corresponding to both analog television broadcasting and digital television broadcasting. It is a figure which shows typically the part corresponding to a luminance signal about the frame memory usage method shown in FIG.2 and FIG.3. FIG. 5 is a diagram schematically illustrating a state of a frame memory in which luminance information is accumulated after a lapse of a certain time from the time point in FIG. 4 (for example, after 5 seconds). It is the flowchart which showed the operation | movement outline | summary of the judgment part in FIG. 2 and FIG. 3 in the control part regarding the recording start instruction | indication of this invention. It is the flowchart which showed the operation | movement outline | summary of the judgment part in FIG. 3 in the control part regarding the dubbing start instruction | indication of this invention. It is the schematic which shows the digital high-definition (HD) signal which is 16: 9 video. FIG. 10 is a schematic diagram showing that an actual video information part is created at an aspect ratio of 4: 3 even though the video aspect ratio is created at a ratio of 16: 9. FIG. 10 is a schematic diagram showing that only a range in which an image is displayed is recorded as an image having an aspect ratio of 4: 3 except for a black portion where there is no left and right information in FIG. 9. It is the schematic explaining the state where only the center part of a picture is displayed in the state where a part on either side cut off. It is the schematic explaining the state by which all the video parts are reproduced | regenerated. It is the schematic explaining the image | video of the ratio of aspect ratio 4: 3 displayed small in the center part of a screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control part 2 Monitor apparatus 3 Optical disk 5 Hard disk 6 Memory card 10 CPU
13 Analog TV tuner 14 A / D converter 15 Video decoder interface LSI
16 Judgment Unit 17 MPEG Encoder 18 Stream Controller 19 Storage Device 20 MPEG Decoder 21 Analog Video / Audio Signal Generation LSI
25 frame memory 26 digital TV tuner

Claims (8)

  In a video / audio recording / reproducing apparatus for recording / reproducing video / audio, such as television broadcast, when actually recording a video having an aspect ratio of 4: 3 and a video aspect ratio of 16: 9, A video / audio recording / reproducing apparatus for recording only a portion where a video is displayed on the recording medium as a video having an aspect ratio of 4: 3.   The video / audio recording / reproducing apparatus according to claim 1, wherein an optical disk is used as the recording medium.   The video / audio recording / reproducing apparatus according to claim 1, wherein a hard disk is used as the recording medium.   The video / audio recording / reproducing apparatus according to claim 1, wherein a memory card is used as the recording medium.   In a video / audio recording / reproducing apparatus for recording / reproducing video / audio, such as television broadcast, from a hard disk recording an image having an aspect ratio of 16: 9 and an actual video portion having an aspect ratio of 4: 3 A video / audio recording / reproducing apparatus, wherein only a portion where an image is actually displayed is recorded on the optical disc as an image having an aspect ratio of 4: 3 when dubbing the image onto the optical disc.   In a video / audio recording / reproducing apparatus for recording / reproducing video / audio, such as television broadcast, from a hard disk recording an image having an aspect ratio of 16: 9 and an actual video portion having an aspect ratio of 4: 3 A video / audio recording / reproducing apparatus characterized in that when a video is dubbed to a memory card, only a portion where the video is actually displayed is recorded on the memory card as a video having an aspect ratio of 4: 3.   In a video / audio recording / reproducing apparatus for recording / reproducing video / audio, such as television broadcasting, an actual video portion of a video for a certain period of time recorded in a hard disk, although the video aspect ratio is 16: 9. When dubbing an image with an aspect ratio of 4: 3 mixed with an image with an actual aspect ratio of 16: 9 onto an optical disc, the aspect ratio exceeds 4: 3 And a video / audio recording / reproducing apparatus for recording the central portion as a video having an aspect ratio of 4: 3 on the optical disc for all video for a certain period of time.   In a video / audio recording / reproducing apparatus for recording / reproducing video / audio such as television broadcasting, an actual video portion of a video for a certain period of time recorded in a hard disk, although the video aspect ratio is 16: 9. When dubbing video with an aspect ratio of 4: 3 and video with an actual aspect ratio of 16: 9 to a memory card, the aspect ratio exceeds 4: 3 A video / audio recording / reproducing apparatus for recording a central portion as a 4: 3 aspect ratio video on the memory card for all video for a certain period of time.

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