JP2000152166A - Image/audio signal reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent audio data from being missing. SOLUTION: An image update time is set in a slide show mode set on a menu and a flash memory 40 stores a count (reference count) corresponding to the update time. An AV cable connects with output terminals 38a, 38b and a television monitor and a speaker connect with the other ends of the AV cable. When a slide show mode is selected, the reference count read from the flash memory 40 is set to a DRAM 24. When a start button 60 is depressed, the television monitor outputs 1st image data. In the case that no audio data are recorded corresponding to the image data or a destination time of the audio data is shorter than the update time, the image is updated for each update time. However, when the recording time is longer than the update time, the image is updated when the reproduction of the audio data is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image / sound reproducing apparatus, and more particularly to an image / sound reproducing apparatus which is applied to, for example, a digital camera and simultaneously reproduces a still image and a sound corresponding thereto.

[0002]

2. Description of the Related Art In a conventional digital camera of this type,
The recordable time of the sound corresponding to one still image is fixed to, for example, 6 seconds, and the reproduction time of each image in the slide show mode is also fixed to 6 seconds. For this reason,
In the slide show mode, the image was not updated before the sound reproduction was completed.

[0003]

In this prior art, if the recordable time of the sound is as short as 6 seconds, the contents to be recorded are limited, and the usability is not improved. On the other hand, if the recordable time is longer than the reproduction time of each image in the slide show mode, part of the reproduced sound will be lost.

[0004] Therefore, a main object of the present invention is to provide an image / sound reproducing apparatus which does not cause loss of reproduced sound even if the recordable time of the sound is lengthened.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an image / sound reproducing apparatus for reproducing corresponding still image signals and sound signals from a recording medium on which a plurality of still image signals and a plurality of sound signals are recorded for a predetermined time. , An image / sound reproducing apparatus characterized by comprising an extension means for extending the reproduction time of the still image signal and the sound signal in accordance with the signal amount of the sound signal.

[0006]

According to one aspect of the present invention, a plurality of still images and a plurality of audio signals are recorded on a recording medium. The still image signal and the audio signal corresponding to each other are reproduced by a predetermined time, and the reproduction time of the still image signal and the audio signal is extended according to the recording time of the audio signal.

In one embodiment of the present invention, the measuring means measures the reproduction time, and the comparing means compares the measurement result with a predetermined time. The updating means updates the still image signal and the audio signal according to the comparison result of the comparing means. The extension means includes a detection means for detecting the end of the reproduction of the audio signal and an activation means for activating the comparison means, and the reproduction means is activated after the reproduction of the audio signal is completed.

In another embodiment of the present invention, the updating means updates the still image signal and the audio signal when the measurement result is longer than a predetermined time. In another embodiment of the present invention, the determination means determines whether a cable is connected to an output terminal for outputting a still image signal and an audio signal to another device. The on / off means turns on / off the extension means depending on the presence or absence of the cable connection.

In another embodiment of the present invention, the setting means arbitrarily sets the update time (predetermined time) of the still image signal, and the set predetermined time is stored in the storage means. When reproducing the still image signal and the audio signal, the still image signal is updated every predetermined time unless the reproduction time is extended.
In another embodiment of the present invention, such an image / sound reproduction device is provided in a digital camera.

[0010]

According to the present invention, since the still image signal is not updated until the reproduction of the audio signal is completed, the reproduced audio is not lost even if the recordable time of the audio is extended. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0011]

Referring to FIG. 1, a digital camera 10 as an image / sound reproducing apparatus according to this embodiment includes a lens 12, and a light image incident from the lens 12 is converted into an electric signal by a CCD imager 14. You. The CCD imager 14 has, for example, a color filter of a primary color Bayer array and outputs an electric signal (progressive scan signal) for each pixel according to progressive scan (pixel sequential scan).

The progressive scan signal from the CCD imager 14 is applied to a CDS / AGC circuit 16. The CDS / AGC circuit 16 includes the CCD imager 14
A known noise elimination and level adjustment are applied to the progressive scan signal from the CDS / AGC circuit 16.
The progressive scan signal processed by
The data is converted into digital data by the / D converter 18. The digital data of the progressive scan signal output from the A / D converter 18 is supplied to the first signal processing circuit 2.
0 is given. The first signal processing circuit 20 outputs digital data (image data) output from the A / D converter 18.
Then, a well-known white balance adjustment and gamma correction are performed, and the image data is output to the data bus 22.

The DRAM 24 stores image data from the first signal processing circuit 20, data of the CPU 28, and the like under the control of the memory control circuit 26 or under the control of the CPU 28. The DRAM 24 is mainly used for displaying an image on the LCD 36. The area other than the area used for video display is used as a work memory of the CPU 28 or used to temporarily save a program from the flash memory 40. DRA
M24 is also connected to CPU 28 via bus 22.

The CPU 28 has an interrupt terminal 28a to which, for example, a 5-byte audio register 42 is supplied with an audio interrupt. The voice for the voice memo is
The microphone 44 supplies the audio data to the A / D converter 46, and the audio data from the A / D converter 46 is supplied to the audio register 42. Each time audio data of, for example, 5 bytes is loaded into the audio register 42, the audio register 42
A voice interrupt is input to the 28 interrupt terminal 28a.

The CPU 28 is further connected to the flash memory 40 via the bus 22. The flash memory 40 stores an operation program of the CPU 28 and, for example, J
This is a recording medium for recording video and audio compressed according to a compression method such as PEG. Note that, as the recording medium, other non-volatile memory than the flash memory may be used.

A bias B1 is also connected to the CPU 28, and one end of a switch SW1 is connected to a connection point between the CPU 28 and the bias B1. Switch SW1 has the other end connected to the ground plane. The switch SW1 is turned on / off in conjunction with attachment / detachment of an AV cable (not shown).
That is, when the AV cable is connected to the audio output terminal 38a and the video output terminal 38b, the switch SW1 is turned on, and the bias B1 is applied to the ground plane. That is, C
The PU 28 is supplied with a low-level signal. On the other hand, A
When the V cable is removed, the switch SW1 is turned off, and the bias B1 is supplied to the CPU 28. That is,
A high level signal is provided to the CPU 28.

The digital camera 10 further includes a shutter button 52, a mode selection button 54, a menu button 56, a slide show button 58, and a start button 6.
0, a voice memo button 62, a delete button 64, a cursor button 66, a decision button 68, and the like. Operation signals from the operation buttons 52 to 68 are given to the system controller 70. The system controller 70
A predetermined control signal is output in response to an operation signal of each of the buttons 52 to 68. This control signal is converted into a serial signal by a P / S converter (not shown), and applied to an interrupt terminal 28a of the CPU 28.

For example, when the shutter button 52 is pressed, the system controller 70 outputs a shutter signal, and the shutter signal is given to the interrupt terminal 28a.
In response to this, the CPU 28 stops inputting (updating) the CCD imager 14, and thus the CCD imager 14
Outputs a still image signal when the shutter button 52 is pressed. When the selection button 54 is operated, a control signal indicating either the playback mode or the camera mode is output from the system controller 70, and the control signal is given to the CPU 28.

The image data read from the DRAM 24 via the output bus 30 is supplied to a second signal processing circuit 32. The second signal processing circuit 32 includes a color separation circuit and a matrix circuit, and converts image data read from the DRAM 24 into luminance data and color data. The luminance data and color data output from the second signal processing circuit 32 are converted by the D / A converter 34 into analog luminance signals and color signals. The luminance signal and the chrominance signal from the D / A converter 34 are supplied to an LCD 36 provided in the digital camera 10 or to a television monitor (not shown) through a video output terminal 38b.

For audio reproduction, the digital camera 10
Further includes a D / A converter 48, which converts the audio data loaded into the audio register 42 into an analog audio signal. This audio signal is supplied to a speaker (not shown) used together with the television monitor via the earphone 50 or the audio output terminal 38a.
When the image data and the audio data obtained by the digital camera 10 are given to a computer, the image data and the audio data are output from a data output terminal 72 connected to the CPU 28.

In the digital camera 10, when the camera mode is set by the mode selection button 54, the LCD 36 can be used as a viewfinder as required. That is, image data obtained by converting the progressive scan signal from the CCD imager 14 into digital data by the A / D converter 18 passes through the first signal processing circuit 20 to the bus 2.
2 is written to the DRAM 24 by DMA, for example. In the DRAM 24, image data is written according to an instruction from the memory control circuit 26. The image data written in the DRAM 24 is subjected to the above-described processing by the second signal processing circuit 32 via the output bus 30 and is converted into an analog signal by the D / A converter 34, and is then sent to the LCD 36 or the video output terminal 38b. Is output. Therefore, since the DRAM 24 is updated with the image data from the CCD imager 14, ie, the first signal processing circuit 20, until the shutter button 52 is pressed, the LCD 36 functions as a viewfinder.

When the shutter button 52 is depressed, a shutter signal is output from the system controller 70 and is supplied to the interrupt terminal 28a of the CPU 28. Therefore, the CPU 28 freezes the CCD imager 14. Accordingly, the image data when the shutter button 52 is finally pressed is written into the DRAM 24 in the manner described above. Therefore, a still image when the shutter button 52 is pressed is displayed on the LCD 36.

In this camera mode, the DRAM 24
The image data stored in the flash memory 4 is compressed by the CPU 28 according to, for example, the JPEG method.
Written to 0. When the voice memo button 62 is operated immediately after the shutter button 52 is pressed and voice is input from the microphone 44, the voice is converted into voice data by the A / D converter 46 and loaded into the voice register 42. Is done. In this embodiment, audio data can be recorded for a maximum of 20 seconds. The audio register 42 has a capacity of 5 bytes as described above.
Is full, a voice interrupt is provided from the voice register 42 to the interrupt terminal 28a of the CPU 28. That is, the audio interruption is given to the CPU 28 every 5 bytes (ie, 10H). Therefore, the CPU 28 takes in the audio data every time the audio interruption occurs, compresses the audio data according to a predetermined signal processing, and compresses the compressed audio data into the DRAM.
24 is temporarily written in a predetermined audio area.

That is, when the CPU 28 processes image data and writes the image data in the flash memory 40, the CPU 28
Since the audio data cannot be written into the flash memory 40, the audio data compressed by the CPU 28 according to the audio interrupt is once written to an appropriate area of the DRAM 24. That is, the compressed audio data is written to the DRAM 24 in parallel with the writing of the compressed image data to the flash memory 40.

When the CPU 28 processes, for example, 12 seconds of audio data, the CPU 28 writes the 12 seconds of audio data stored in the DRAM 24 to the flash memory 40 in association with the image data. When the playback mode is selected by the mode selection button 54, the playback mode signal
PU28. Therefore, in the reproduction mode, the CPU 28 reads out image data from the flash memory 40 through the bus 22 and writes the image data into a predetermined area of the DRAM 24 through the bus 22. And
The CPU 28 expands the image data once written in the DRAM 24 according to a predetermined signal processing, for example, the JPEG method. The decompressed image data is written to the DRAM 24. Therefore, reproduced image data is output from the DRAM 24, and the reproduced image is displayed on the LCD 36 via the second signal processing circuit 32 and the D / A converter 34. The audio data read from the flash memory 40 is expanded by the CPU 28 in the same manner as the image data, and is output from the interrupt terminal 28a of the CPU 28 to the audio register 42. Therefore, the voice memo written in the flash memory 40 from the earphone 50 or the voice output terminal 38a is reproduced. In the playback mode, when the shutter button 52 or the erase button 64 is operated while the image played back on the LCD 36 is displayed, the CPU 28 erases the image data of the image from the flash memory 40 in response to the operation.

When the menu button 56 is pressed, the LCD
A menu screen is displayed at 36, and a time (update time) for updating an image in the slide show mode based on the menu screen is set. That is, when the operator inputs a desired update time with the cursor button 66 and presses the decision button 68, the CPU 28 stores the corresponding reference count value in the flash memory 40. The counter 28b provided in the CPU 28 is incremented in response to a vertical motive signal output every 1/30 second from a timing generator (not shown). Therefore, if the desired updated character interval is 10 seconds, the reference count value “300” is written to the flash memory 40. When the reference count value is written, the setting of the update time is completed. In this embodiment, the update time is set between 1 and 20 seconds.

The CPU 28 performs processing according to the flowchart shown in FIG. When the menu button 56 is pressed, the process starts, and it is determined in step S1 whether or not the update time has been set. If "NO" here, the process returns to the step S1, but if "YES", the count value (reference count value) corresponding to the update time set in the step S3 is stored in the flash memory 40, and the return is performed. I do.

When the slide show button 58 is pressed,
The slide show mode is selected. Then, the reference count value stored in the flash memory 40 (“30
0 ") is set in the DRAM 24. Here, when the start button 60 is pressed, the first image data is read out from the flash memory 40 and expanded on the DRAM 24. Therefore, the first image is displayed on the LCD 36. When the decompression processing of the image data is completed, the CPU 28 detects whether or not there is audio data related to the image data, and if there is the audio data, temporarily stores the audio data from the flash memory 40 into the DRAM 24. CPU 28
Expands the audio data using an arbitrary area of the DRAM 24, and loads the expanded audio data into the register 42 via the interrupt terminal 28a. The audio data output from the register 42 is supplied to the earphone 50 and the audio output terminal 38a via the D / A converter 48. Audio output terminal 3
The audio data given to 8a is output from a speaker via an AV cable.

If there is no audio data corresponding to the image data or if the recording time is shorter than the update time, the CPU 28 reads out the second image data from the flash memory 40 and expands it using the DRAM 24 after the update time has elapsed. I do. However, if the recording time is longer than the update time,
After all the audio data has been reproduced, the second image data is expanded. Therefore, the LCD 36 is updated, and the second image is output. In this way, all images and corresponding sounds are output. Such an operation is repeated until the final image is displayed.

The above-described operation is performed by the CPU 28 in accordance with the flowcharts shown in FIGS. When the slide show mode is selected, the CPU 28 starts processing,
In step S11, the update time (10
The reference count value (“300”) corresponding to (seconds) is read from the flash memory 40 and set in the DRAM 24. In a succeeding step S13, a first image is displayed.
In step S15, it is determined whether the start button 60 has been pressed. If "NO" here, the process returns to the step S15, but if "YES", the process returns to the step S1.
At 7, the counter 28b is activated (enabled). Therefore, the counter 28b is incremented in response to the vertical synchronization signal.

In the step S19, it is determined whether or not the AV cable is connected. That is, it is determined whether the switch SW1 is on. Here, if "NO",
The process proceeds to step S27, but if "YES", it is determined whether there is audio data corresponding to the image displayed in step S21. If “NO” in the step S21, the process proceeds to a step S27, but if “YES”, the process proceeds to a step S23. In step S23, a predetermined amount of audio data is reproduced, and in step S25, it is determined whether the reproduction of the audio data has been completed. Here, "NO"
If so, the process returns to step S23, but if "YES", the process proceeds to step S27. In step S27, the count value of the counter 28b is changed to the reference count value (“30
0 ”) or more.If“ NO ”, the process returns to the step S27.
Proceed to step S29. In step S29, it is determined whether the currently displayed image is the final image. Here, “Y
If "ES", return. If "NO", return.
In step S31, the next image is displayed, and in step S33
Resets the counter 28b, and returns to step S19.

That is, when there is a sound corresponding to an image, the screen is not updated until all sounds have been completed. After the sound reproduction is completed, the count value of the counter 28b is compared with the reference count value, and if the count value is small, the screen is updated when the count value reaches the reference count value. On the other hand, if the count value is larger than the reference count value,
Update the screen promptly. The current image is continuously displayed even after the count value reaches the reference count value, and is updated to the next image when all sounds are reproduced.

According to this embodiment, in the slide show mode, the screen is updated at every update time, and when the recording time of the sound corresponding to the image is longer than the update time, the screen is updated at the time when the sound reproduction ends. So that the screen update time is extended so that no audio is lost. Although the digital camera has been described in this embodiment, the CPU of the computer which has transferred the image data and the audio data has been described.
By performing the same processing in the above, the slide show mode as described above can be executed by the computer.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is a flowchart showing a part of the processing of the CPU shown in FIG. 1 embodiment;

FIG. 3 is a flowchart showing a part of the processing of the CPU shown in the embodiment in FIG. 1;

FIG. 4 is a flowchart showing a part of the processing of the CPU shown in the embodiment in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Digital camera 24 ... DRAM 26 ... Memory control circuit 28 ... CPU 40 ... Flash memory 42 ... Register 52 ... Shutter button 66 ... System controller

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04N 5/92 EF term (Reference) 5C052 AA17 DD02 DD06 DD09 GA02 GB06 GB07 GC06 GD00 GD05 GD06 GE06 5C053 FA08 FA10 FA27 GA11 GB11 GB36 HA27 JA03 KA04 KA05 KA24 KA25 LA02 5D045 AB30 DB01

Claims (6)

[Claims] 1. An image / sound reproducing apparatus for reproducing a still image signal and a sound signal corresponding to each other from a recording medium on which a plurality of still image signals and a plurality of sound signals are recorded for a predetermined time, wherein the signal amount of the sound signal is An image / sound reproducing apparatus comprising an extension means for extending the reproduction time of the still image signal and the sound signal in accordance with the following. 2. A measuring means for measuring the reproduction time; a comparing means for comparing a measurement result of the measuring means with the predetermined time; and a means for outputting the still image signal and the audio signal in accordance with the comparison result of the comparing means. Update means for updating, wherein the extension means includes detection means for detecting the end of the reproduction of the audio signal, and activation means for activating the comparison means after the reproduction of the audio signal is completed. Item 7. The image / audio reproduction device according to Item 1. 3. The image / sound reproducing apparatus according to claim 2, wherein said updating means updates when said measurement result is equal to or longer than said predetermined time. 4. An output terminal for outputting the still image signal and the audio signal to another device, determining means for determining whether a cable is connected to the output terminal, and the extension in accordance with a determination result of the determining means. 3. The image of claim 2, further comprising on / off means for turning on / off the means.
Audio playback device. 5. A setting means for arbitrarily setting the predetermined time,
The image / sound reproducing apparatus according to any one of claims 1 to 4, further comprising storage means for storing the set predetermined time. 6. A digital camera comprising the image / sound reproducing device according to claim 1.