JP2002101374A - Device for recording and reproducing program signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem due to the fact that a reproduced program scene to be displayed on the screen is easily confused with a program scene in the middle of broadcasting when time shift reproduction or cache reproduction is performed in a PVR. SOLUTION: A video recording position mark (a) corresponding to the current time and a reproduction position mark (b) corresponding to the recording time of a program that is reproduced are displayed on bar (c) on which time is defined as a scale when a cache is reproduced. Because the color of the bar is subjected to reversing display as (d) for the period of a program signal, when the cache exists, what time a program can be reproduced from the cache can be confirmed at a glance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program signal recording / reproducing apparatus for recording a received program signal on a recording medium such as a hard disk and reproducing the same.

[0002]

2. Description of the Related Art There is known an apparatus for recording and reproducing program signals using a hard disk as a recording medium. Such a device is called a PVR (Personal Video Recorder), and can simultaneously execute recording and reproduction of a program signal (actually, the recording operation and the reproduction operation are quickly switched and time-division processing is performed).

[0003] Therefore, when this PVR is used, simultaneous recording / reproduction for reproducing another program on the hard disk while recording a certain program, or recording a program while recording a certain program. It is also possible to perform time-shift reproduction in which reproduction is performed from a head portion or a recorded desired portion. A function similar to the time shift reproduction is cache reproduction.

[0004] In this cache reproduction, a hard disk is used as a cache disk, and programs being broadcast are always recorded on the hard disk for a predetermined time. Then, when it is desired to perform reproduction again from a scene immediately before, reproduction is performed from a favorite scene by going back within a predetermined time range stored as a cache.

[0005]

However, when time shift reproduction or cache reproduction is performed as described above,
It is difficult to understand whether the image displayed on the screen is a scene of a program being broadcast or a scene of a program being reproduced from a hard disk, which may cause confusion to the user.

[0006] In particular, when a program being broadcast with the time superimposed on the upper left portion of the screen or the like is time-shifted or cache-reproduced, confusion is likely to occur, and the user is likely to be superimposed on the screen. The time displayed in the pose was often illusioned with the current time.

[0007] In order to solve the problems as described above, a program signal reproducing apparatus according to the present invention has an object of displaying a difference between a program being broadcast and a program being reproduced on a screen in an easy-to-understand manner. An object of the present invention is to display a reproduction position in a program being reproduced in an easily understandable manner.

[0008]

In order to solve the above problems, a program signal recording / reproducing apparatus according to the present invention records a program signal on a recording medium (4) and simultaneously records the program signal on the recording medium (4). A program signal recording / reproducing apparatus for reproducing a recorded portion of the program signal being recorded in the program signal, and generating first time information in accordance with the passage of time;
And second time information indicating the time when the program signal reproduced from the recording medium (4) was recorded on the recording medium (4) or the time when the program signal was broadcast. (4) a time information acquiring means (5) for acquiring from the reproduction signal; and an on-screen information adding means (7) for superimposing on-screen information on a program signal reproduced from the recording medium (4). The on-screen information adding means (7) displays a time identification image including at least a time display as the on-screen information and a first time information displayed at a position corresponding to the first time information generated by the time information generating means (10). And a second identification mark (b) displayed at a position corresponding to the second time information acquired by the time information acquiring means (5). A.

[0009] Further, a program signal recording / reproducing apparatus according to the present invention comprises:
Recording means (3) for recording the first time information generated by the time information generating means (10) together with the program signal on the recording medium (4), and a first time information recorded on the recording medium (4). 1 further comprising a reproducing means (3) for reproducing the time information and the program signal, wherein the time information obtaining means (5) comprises:
The second time information is obtained based on the first time information reproduced from the reproducing means (3).

[0010]

FIG. 1 is a diagram for explaining a configuration of a program signal recording / reproducing apparatus according to an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a program signal to be recorded coming in the form of a video signal and an audio signal.
The recording signal processing unit 2 that performs compression processing such as ng Picture Experts Group) or the like and outputs the compressed program signal output by the recording signal processing unit 1 after adding additional information to be described later. The recording controller 3, which stores the program signal in the buffer and outputs the signal at a predetermined timing, converts the program signal output from the recording controller 2 into a signal form suitable for recording on a recording medium and outputs the signal, or reproduces the program signal from the recording medium. This is a media manager that converts a program signal into an original signal form and outputs the converted signal.

A recording medium 4 comprises a hard disk or a semiconductor memory, etc., on which program signals from the media manager 3 are recorded / reproduced. A reference numeral 5 stores a program signal from the media manager 3 in a buffer (not shown). A playback controller that outputs this at the timing of, and further extracts additional information added to the program signal,
Reference numeral 6 denotes a reproduction signal processing unit that performs a decompression process such as the MPEG method on the program signal from the reproduction controller 5, outputs the program signal in the form of a video signal and an audio signal, and outputs a synchronization signal of the video signal.

Reference numeral 7 denotes an OSD for appropriately adding on-screen information to the program signal output from the reproduction signal processing unit 6 and outputting the program signal.
(On Screen Display) processing unit 8 is a reproduction signal processing unit 6
Is a display controller that receives the synchronization signal output by the controller and controls the OSD processing unit 7 based on the timing of the synchronization signal.

Reference numeral 9 denotes a recording controller 2, a media manager 3, a reproduction controller 5, and a display controller 8.
, A system clock for supplying date information and current time information to the system controller 9, a program reservation information 11 for accumulating program reservation information, and a system A recording reservation manager 12 for exchanging information with the controller 9 is a key input unit for transmitting a user's instruction to the system controller 9. The key input unit 12 may be a button provided on the main body of the recording / reproducing apparatus, a remote control transmitter provided outside the apparatus, or an external device connected via an interface such as IEEE1394.

Hereinafter, the operation of the program signal recording / reproducing apparatus according to the present invention will be described. First, the operation when recording a program signal on the recording medium 4 will be described. An incoming program signal is converted into an MPEG program signal by the recording signal processing unit 1 and output to the recording controller 2.

On the other hand, the system controller 9 is supplied with date information and current time information in accordance with the passage of time from the system clock 10, and the system controller 9
The information is output to the recording controller 2. Then, the recording controller 2 adds the date information and the current time information from the system controller 9 and the internally generated frame information to the program signal output from the recording signal processing unit 1 as additional information. The added program signals are sequentially stored in the internal buffer.

Thereafter, under the control of the system controller 9, the program signal is read from the internal buffer, and is converted by the media manager 3 into a signal form suitable for recording on the recording medium 4. Here, assuming that a hard disk is used as the recording medium 4, the media manager 3 converts the program signal into data in a file format suitable for recording on the hard disk, and this data is stored in the recording medium 4 (hard disk). Recorded above.

At this time, not only the program signal but also the additional information added by the recording controller 2 is recorded on the recording medium 4, and the recording address of the program signal and the recorded additional information are recorded on the recording medium 4. Program-related information to be associated with the information is recorded.

On the other hand, when the program signal recorded on the recording medium 4 is reproduced, the system controller 9 controls the media manager 3 so that the program-related information is read from the recording medium 4, and the program-related information is read. , The reading of the program signal from a predetermined address of the recording medium 4 is started.

The read program signal is converted to the original signal form via the media manager 3 and output to the reproduction controller 5. The reproduction controller 5 temporarily stores the program signal in its internal buffer, reads it out, and then extracts additional information added to the program signal.

Here, the reproduction controller 5 outputs the program signal to the reproduction signal processing unit 6, while outputting the extracted additional information to the system controller 9, and the reproduction signal processing unit 6
A program signal obtained by subjecting the compressed program signal to an MPEG expansion process is output to the OSD processing unit 7,
The synchronization signal is output to the display controller 8.

Then, the system controller 9 outputs the additional information from the reproduction controller 5 to the display controller 8, and the display controller 8 outputs the additional information based on the synchronization signal from the reproduction signal processing unit 6 and the additional information from the system controller 9. The OSD processing unit 7 is controlled so that on-screen display is performed as shown in FIG.

FIG. 2 is a diagram showing the on-screen information displayed on the screen when the normal reproduction is performed as described above. The time of the entire program is displayed as a bar as shown in FIG. A playback position mark (b) is displayed at a position corresponding to the elapsed playback time. In the upper left part of the screen, the playback elapsed time from the beginning of the program is displayed numerically as shown in (c), and in the upper right part of the screen, the date when the program was recorded is displayed as shown in (d). Then, the program signal to which the above-described on-screen information is added is output from the OSD processing unit 7.

Next, an operation in a cache ON state in which the recording medium 4 is used as a cache will be described. To set the cache ON state, first, the user sets the cache holding time via the key input unit 12. In other words, it sets how long the program signal for the recording medium 4 is kept stored. It is needless to say that the user may keep the program signal for a predetermined time instead of setting the cache holding time every time the cache is turned on.

When the cache is turned on, the recording signal processing unit 1, the recording controller 2, and the media manager 3 function in the same manner as the recording operation described above.
Additional information is recorded in addition to the program signal. Here, the system controller 9 keeps monitoring the time of the program signal cached on the recording medium 4 through the media manager 3, and always keeps the latest program signal for the set cache holding time. Therefore, the program signal whose cache holding time has elapsed is automatically deleted from the recording medium 4.

The system controller 9 outputs the current time information from the system clock 10 and the time information of the program signal cached on the recording medium 4 to the display controller 8, and the display controller 8 shown in FIG. The display controller 8 controls the OSD processing unit 7 so that on-screen display is performed as described above. In the case of the configuration shown in FIG. 1, the program signal compressed by the recording signal processing unit 1 is recorded on the recording medium 4 and decompressed by the reproduction signal processing unit 6; It goes without saying that a program signal that has not been subjected to decompression processing may be supplied to the OSD processing unit 7.

FIG. 3 is a diagram showing on-screen information displayed on the screen in the cache ON state. A bar with time scale is displayed as shown by (e), and a bar corresponding to the current time on this bar is displayed. A recording position mark (へ) is displayed at the position where the recording is performed. Also, during the period of the program signal having a cache on the recording medium 4, the color of the bar is displayed in reverse video as shown in (g), so that it can be confirmed what time or later the program signal has been cached on the recording medium 4. Comes out. In addition to the recording position mark (f) on the bar, the current time is displayed in the upper right part of the screen as shown in (h).

Then, in this cache ON state, when the user instructs rewinding through the key input unit 12 so as to trace back the program reproduction, the state shifts to the cache reproduction state. In this cache reproduction state, the program signal with the additional information output from the recording controller 2 is recorded on the recording medium 4 via the media manager 3, and the cached program signal is transmitted from the recording medium 4 to the media manager. 3 to the reproduction controller 5.

At this time, the media manager 3 switches at a high speed between an operation of recording a program signal from the recording controller 2 on the recording medium 4 and an operation of outputting a program signal reproduced from the recording medium 4 to the reproduction controller 5. Time-division processing. Therefore, the system controller 9
At the timing of recording the program signal, the recording controller 2
The recording controller 2 and the media manager 3 are controlled so that the program signal is read out from the buffer in the medium, and the program signal is reproduced at a timing when recording is not performed, and the medium is written in the buffer in the reproduction controller 5. Manager 3 and playback controller 5
Control.

[0029] Then, the reproduction controller 5 extracts additional information from the reproduced program signal, and outputs the additional information to the system controller 9. Then, the system controller 9 outputs the additional information from the reproduction controller 5 and the current time information from the system clock 10 to the display controller 8, and the display controller 8 displays the on-screen display as shown in FIG. The controller 8 controls the OSD processing unit 7.

FIG. 4 is a diagram showing on-screen information displayed on the screen in the cache reproduction state. A bar with time scale is displayed as shown by (e), and a bar corresponding to the current time on this bar is displayed. A recording position mark (へ) is displayed at the position where the recording is performed. In addition, a reproduction position mark (b) is displayed at a position corresponding to the time of recording of the program signal being reproduced from the recording medium 4, and the period of the program signal having a cache on the recording medium 4 is ( The color of the bar is highlighted as shown in (g). In addition to the reproduction position mark (b) on the bar, the time at the time of recording of the program signal being reproduced is displayed at the upper left of the screen as shown in (i), and the upper right part of the screen shows ( The current time is displayed as shown in (h).

In the cache reproduction state, the key input unit 1
By instructing fast-forward or rewind via 2
It is possible to easily recall a scene temporally earlier or later than the current playback position of the program signal shown in (b). FIG. 5 is a diagram showing on-screen information displayed on the screen in the cache fast-forward playback state. A fast-forward position mark (nu) is displayed on a bar instead of the playback position mark (b) shown in FIG. On the other hand, in the cache rewind reproduction state, the fast-forward position mark (nu) and the rewind position mark which is a left / right symmetric mark are used.

Then, when the cache fast-forward reproduction state shown in FIG. 5 is continued, the fast-forward position mark (nu) approaches the recording position mark (f), but the reproduction point of the program signal from the recording medium 4 is being broadcast. Upon catching up to the location of the program signal, the screen display is switched to the screen display when the cache is ON shown in FIG.

The above-described cache reproduction, cache fast-forward reproduction, and cache rewind reproduction can be performed only during the period in which the color of the bar shown in (g) is highlighted, and for the other periods, Needless to say, these cannot be reproduced.

As described above, in the cache ON state, only the recording position mark (F) is displayed on the bar as shown in FIG. 3, while in the cache reproduction state, the recording position mark (F) is displayed on the bar as shown in FIG. And the reproduction position mark (b) are displayed, it is possible to prevent a trouble that an image displayed on the screen is illusioned with a scene of a broadcast program in a cache reproduction state in which a program recorded in the past is reproduced.

Also, at the time of cache reproduction, as shown in FIG. 4, since the time at which the program signal being reproduced is recorded can be confirmed on the screen, the time when the scene of the program being reproduced is broadcast Can be confirmed. On the other hand, when a broadcast program of sports information or a broadcast program of weather information is cached, a desired scene is searched for based on the recording time displayed on the screen. It is also possible. Further, since the bar is highlighted during the period in which the cache exists, it is possible to see at a glance what time the program can be reproduced from the cache.

Next, a description will be given of a time-shift reproduction operation for recording a program on the recording medium 4 and reproducing the program from a desired portion recorded on the recording medium 4. Note that, in the time shift reproduction, unlike the cache operation described above, the recorded program is not automatically deleted from the recording medium 4.

In the state where the program signal compressed by the recording signal processing section 1 is recorded on the recording medium 4, when the user gives an instruction to reproduce from the beginning of the program, time-shift reproduction is started at that time. . And the media manager 3
An operation of recording the program signal from the recording controller 2 on the recording medium 4 as in the case of the cache reproduction described above,
The operation of outputting the program signal reproduced from the recording medium 4 to the reproduction controller is switched at high speed to perform the time division processing.

FIG. 6 is a diagram showing on-screen information displayed on the screen in the time-shifted reproduction state. FIG. 6 shows a bar (e), a reproduction position, and a time scale used in the cache reproduction shown in FIG. The information of the mark (b), the recording position mark (f), the time (i) at the time of recording of the program signal being reproduced, and the current time (h) are displayed in the same manner even during time shift reproduction. . Also, the display (g) indicating the period during which the program signal is recorded is displayed in the same manner during time-shift reproduction, but since there is no setting to hold the program signal for a predetermined time as in the case of cache reproduction, there is no setting. The only difference is that this display becomes longer as the recording progresses.

As described above, even if the reproduction is not started from the beginning of the program, the time-shift reproduction can be started from the middle of the program by instructing the rewind during the recording of the program signal. When a rewind instruction is issued, the previously described rewind position mark is displayed instead of the reproduction position mark (b). When a fast forward instruction is issued, the previously described fast forward position mark is reproduced. It is displayed instead of the position mark (b).

In the above description, an example is shown in which an incoming program signal is compressed by the recording signal processing unit 1 and output to the recording controller 2. For example, a program signal compressed by the MPEG system is transmitted. When receiving and recording this, it goes without saying that the received program signal may be directly supplied to the recording controller 2 without going through the recording signal processing unit 1.

If the time information at the time of broadcasting the program signal is already superimposed on the program signal compressed by the MPEG system, the recording controller 2 outputs the superimposed time information together with the program signal. System clock 1
It is not necessary to add the current time information output by 0 to this program signal. Then, the time information recorded together with the program signal is reproduced together with the program signal.
When the program signal is reproduced, the time information at the time of broadcasting the program is extracted.

In the above description, the display (g) indicating the period during which the program signal is recorded is the same in the cache reproduction state and the time shift reproduction state. By making this display blue in the cache reproduction state and making this display red in the time shift reproduction state, the cache reproduction state and the time shift reproduction state can be distinguished on the screen.

As for the bar display (e), any other form may be used as long as it is a time identification image including at least the time display. For example, the scale may be removed and only the time may be displayed side by side. However, adding a scale makes it easier to identify the time, so it is desirable to add a scale.

Further, it is needless to say that the time identification image including the time display may have a circular shape instead of a bar shape. Further, even if the reproduction position mark (b) and the recording position mark (to) are not displayed on the time identification image, a position different from the time identification image as long as the position corresponds to the time display of the time identification image. It may be.

[0045]

According to the present invention, the on-screen information adding means displays the first identification mark and the second identification mark using the time as a scale, so that the image displayed on the screen is broadcasted. It is possible to prevent not only the trouble of illusioning that the scene is a program scene, but also to confirm at what time the scene of the program being reproduced is recorded or broadcast. In addition, it is possible to easily search for a desired scene based on these screen displays.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a configuration of a program signal recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing a screen display during normal reproduction.

FIG. 3 is a diagram showing a screen display when a cache is turned on.

FIG. 4 is a diagram showing a screen display during cache reproduction.

FIG. 5 is a diagram showing a screen display at the time of cache fast-forward reproduction.

FIG. 6 is a diagram showing a screen display during time shift reproduction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Recording signal processing part 2 ... Recording controller 3 ... Media manager 4 ... Recording medium 5 ... Reproduction controller 6 ... Reproduction signal processing part 7 ... OSD processing part 8 ... Display controller 9 ... System controller 10 ... System clock 11 ... Recording reservation manager 12 ... Key input section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/445 H04N 5/781 510L F-term (Reference) 5C025 CA09 CB06 DA10 5D044 AB07 BC01 CC04 DE17 DE22 EF05 FG18 GK11 5D077 AA22 BA08 CA02 DC11 DE05 HC04 HC21 HC25

Claims (2)

[Claims] Claims 1. A program signal is recorded on a recording medium,
A program signal recording / reproducing apparatus for reproducing a recorded portion of the program signal being recorded on the recording medium, wherein the time information generating means generates first time information in accordance with the passage of time; and Time information obtaining means for obtaining, from the reproduction signal of the recording medium, second time information indicating the time at which the reproduced program signal was recorded on the recording medium or the time at which the program signal was broadcast, On-screen information adding means for superimposing on-screen information on a program signal reproduced from the recording medium, wherein the on-screen information adding means includes a time identification image including at least a time display as the on-screen information; A first identification mark displayed at a position corresponding to the first time information generated by the information generating means, and a second identification mark obtained by the time information obtaining means. A program signal recording / reproducing apparatus characterized by adding a second identification mark to be displayed at a position corresponding to time information. 2. A recording means for recording, on the recording medium, the first time information generated by the time information generating means as the second time information together with the program signal; And a reproduction unit that reproduces the second time information and the program signal, wherein the time information obtaining unit obtains the second time information based on the first time information. Item 3. The program signal recording / reproducing apparatus according to Item 1.