JP4602201B2 - Television broadcast receiving apparatus and television broadcast receiving method - Google Patents

Description

  The present invention relates to a television broadcast receiving apparatus and a television broadcast receiving method in which a program is continuously recorded on a recording medium.

  While enjoying a television broadcast, it is often the case that a telephone call suddenly rings or a visitor misses the broadcast program. If a television broadcast program is missed, it cannot be viewed again, except for a rebroadcast program. Programs that are rebroadcast in a short period of time are rare, and news programs and sports programs are not rebroadcast in most cases. Therefore, in many cases, if a television broadcast program is missed, the program cannot be viewed again.

  In addition, scenes that are desired to be saved while watching broadcast programs such as famous scenes of movies and dramas, interviews with important persons, highlight scenes of sports programs, etc. may suddenly start. In such a case, even if the VTR is set immediately, the scene is often not in time and the scene cannot be recorded.

  Therefore, the present inventor has proposed a television receiver that records a program on a recording medium continuously while watching a broadcast program. In such a television receiver, even if there is a sudden telephone call or visitor, the program can be played back retroactively, so that the program is not missed. In addition, the program can be easily saved, and it is possible to cope with a sudden start of a program to be recorded.

  Further, the inventor of the present application proposes to use a hard disk drive as a recording medium in a television receiver that continuously records a program on a recording medium. Conventionally, a magnetic tape has been widely used as a recording medium for recording a video signal. However, the magnetic tape has a low access speed and is difficult to use as a recording medium used in such a television receiver. Although semiconductor memory can be used, large-capacity semiconductor memory is very expensive, and the stored program disappears when the power is turned off. It is not suitable for cases where In contrast, a hard disk drive has a large capacity and a sufficiently high access speed.

  In such a television receiver that continuously records a program on a recording medium, a video signal based on the received television broadcast radio wave is converted into a digital video / audio signal, and is compressed and encoded by a predetermined method. Recorded against. For example, motion JPEG is used for compression encoding of video data. On the other hand, the audio signal is also converted into digital data by a predetermined method, compression-coded, and recorded.

  FIG. 12 shows an example of the operation of a television receiver that continuously records a program on a recording medium according to this prior art. A television broadcast as shown in FIG. 12A is received by the tuner. Hereinafter, this television broadcast received by the tuner is referred to as a real-time broadcast, and is distinguished from a television broadcast image reproduced from a hard disk drive. The received signal is processed as described above, and is always written and recorded on the hard disk drive in real time.

Here, consider a case where there is a scene that the user missed while viewing the real-time broadcast, and the missed scene is reproduced by a predetermined method, for example, by an instruction from the remote commander. For example, in FIG. 12, at time A when section a ₂ ends, the user issues an instruction to reproduce a missed scene to the television receiver. Then, in the television receiver, the compressed data of the section a ₀ to the section a ₂ is read from the hard disk drive by a preset time t ₀ from the time point A when the instruction is issued. The read compressed data is sequentially converted into a reproduced video / audio signal that starts at time A through a predetermined process such as compression / decompression (FIG. 12B). Note that the start timing of the reproduced video / audio signal is actually accompanied by some delay due to signal processing.

The reproduced video / audio signal thus obtained is reproduced by the video monitor of the television receiver for the video signal and by the speaker for the audio signal. The reproduced video / audio signals in the sections a ₀ to a ₂ read from these hard disk drives are reproduced from the time point A as shown in FIG. 12C. In this example, the sections a ₃ to a _{5 of the} real-time broadcast are reproduced. Is replaced and played. When the reproduction of the section a ₀ to the section a ₂ is finished, the monitor video and the speaker sound are returned to those based on the real-time broadcast.

However, in a television receiver that continuously records a program on a recording medium according to this prior art, when reproducing compressed data recorded on a hard disk drive going back from the present time, a predetermined time t ₀ is used. It was only going back. Therefore, there is a problem that it is impossible to return to an arbitrary scene that the user wants to see and reproduce. That is, for example, in FIG. 12, even when it is desired to view only the section a ₁ again at the time point A, there is a problem that the playback must start from the section a ₀ .

  In addition, this conventional television receiver has a problem that it cannot be traced back while searching for a desired scene.

  Furthermore, this conventional television receiver has a problem that it is not possible to make a real-time broadcast video stand still and wait (pause). For example, when the user has stood up for a while, playback cannot be started from a scene that was interrupted when the user returned.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a television broadcast receiving apparatus and a television broadcast receiving method capable of flexibly reproducing video and audio from a recording medium on which a program is continuously recorded according to a user's request. There is.

In order to solve the above-described problems, the present invention provides a recording medium for continuously recording received television broadcasts, and a recording medium for controlling recording on the recording medium and reproduction from the recording medium in parallel. A control means, a first graphic indicating first time information corresponding to the current time, and a second corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium The difference between the first time information and the second time information is obtained by using the second graphic representing the time information and the third graphic representing the time axis indicating the change in time by changing the display. The first graphic is displayed visually according to the interval between the first and second graphics, and the first graphic is fixedly displayed on one end of the third graphic, and is reproduced from the recording medium and synchronized with the currently displayed video. , the mobile second graphic along the third figure A display control means for controlling the recording medium, and the recording medium control means can select any position in the reverse direction in time series from the position recorded immediately before on the recording medium during reception of the television broadcast. Is reproduced at a first speed toward a forward direction, and is reproduced at a second speed different from the first speed in a chronologically positive direction from an arbitrary position. controlled so as to display an image that is chronologically play backwards at a speed, a time series is Te revision broadcast receiving apparatus adapted to specify the position to be reproduced towards the positive direction.

The present invention also includes a step of continuously recording a received television broadcast on a recording medium, and a recording medium control step of controlling the recording to the recording medium and the reproduction from the recording medium in parallel. A first graphic indicating first time information corresponding to the current time and a second time information corresponding to the time when the video reproduced from the recording medium and currently displayed are recorded on the recording medium are shown. a second graphic shows the variation in time by the display is changed, by using the third graphic representing the time axis, a difference between the first time information and second time information, the first and The first graphic is displayed visually by the interval of the second graphic, and the first graphic is fixedly displayed on one end side of the third graphic, and the first graphic is reproduced from the recording medium and synchronized with the currently displayed video. as the second figure is moved along the third figure And a step of display control for controlling, steps of recording medium control, during the reception of the television broadcast, the recording position immediately before the recording medium, when the series in any position in the direction And at a second speed different from the first speed in a chronologically positive direction from an arbitrary position. The display control step includes the steps of: controlled so as to display an image that is chronologically play backwards at a speed, a time series is Te revision broadcast receiving method to specify a location to be reproduced towards the positive direction.

The present invention also provides a recording medium for continuously recording the received television broadcast, a recording medium control means for controlling the recording to the recording medium and the reproduction from the recording medium in parallel, and the television broadcasting. A still image display control means for controlling to display the image according to a still image , a first graphic indicating first time information corresponding to the current time, and a currently reproduced image reproduced from the recording medium. Using a second graphic showing the second time information corresponding to the time when recorded on the recording medium, and a third graphic showing the time axis indicating the change in time as the display changes, The difference between the first time information and the second time information is visually displayed by the interval between the first and second graphics, and the first graphic is fixedly displayed on one end side of the third graphic. And is currently displayed from the recording medium. In synchronization with the video being, the second graphic and a display control means for controlling so as to move along the third figure, the recording medium control means were stationary after the still is released from the corresponding scene time is Te revision broadcast receiving apparatus to perform the reproduction.

The present invention also includes a step of continuously recording a received television broadcast on a recording medium, and a recording medium control step of controlling the recording to the recording medium and the reproduction from the recording medium in parallel. A step of controlling to display a video by television broadcasting in a stationary manner, a first graphic showing first time information corresponding to the current time, and a video reproduced from the recording medium and currently displayed are recorded. Using the second graphic showing the second time information corresponding to the time when recorded on the medium, and the third graphic showing the time axis indicating the change of the time by changing the display, The difference between the first time information and the second time information is visually displayed by the interval between the first and second graphics, and the first graphic is fixedly displayed at one end of the third graphic. Is currently played from the recording medium In synchronization with the video shown, the second graphic and a step of display control for controlling to move along the third figure, the recording medium control step, after the still is released from the scene corresponding to the still is time was a Te revision broadcast receiving method to perform reproduction.

As described above, according to the first aspect of the present invention, recording is continuously performed on a received television broadcast recording medium, and recording on the recording medium and reproduction from the recording medium are performed in parallel, at the current time. A first graphic showing the corresponding first time information and a second graphic showing the second time information corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium And the third graphic representing the time axis indicating the time change as the display changes, and the difference between the first time information and the second time information is represented by the first graphic and the second graphic. with a visual indication by the distance of the first graphic fixedly displayed at one end of the third figure, in synchronization with the image being displayed currently playing from the recording medium, the second graphic controlled so as to move along the third figure, the television broadcast During transmission, playback is performed at a first speed from the position recorded immediately before to the recording medium to an arbitrary position in the reverse direction in time series, and from the arbitrary position in the positive direction in time series And playing back at a second speed different from the first speed, and controlling to display a video played back in the reverse direction in time series at the first speed, and positive in time series Since the position to be played back in the direction is designated, the television broadcast can be played back in time.

According to a second aspect of the present invention, a received television broadcast is continuously recorded on a recording medium, and recording on the recording medium and reproduction from the recording medium are performed in parallel. The first graphic indicating the first time information corresponding to the current time, and the video currently reproduced and displayed from the recording medium is recorded on the recording medium. Using the second graphic indicating the second time information corresponding to the time and the third graphic indicating the time axis indicating the change of the time by changing the display, the first time information and the second The difference from the time information is visually displayed by the interval between the first and second graphics, and the first graphic is fixedly displayed on one end of the third graphic, and is reproduced from the recording medium and is currently displayed. The second figure is synchronized with the displayed image. Along the third graphic controls to move, since the still is from the scene corresponding to the time obtained by stationary after being released to perform reproduction can be reproduced back in time a television broadcast .

  As described above, according to the present invention, audio data and video data by real-time broadcasting are always recorded on the hard disk drive, and the recorded data can be reproduced by various methods. Yes. Therefore, there is an effect that even if there is a scene that is missed while watching a program by real-time broadcasting, it is possible to go back to an arbitrary scene that the user wants to see and review the missed scene.

  Similarly, it is possible to pause a program based on real-time broadcasting and, for example, after completing another task, cancel the pause and view a scene following the paused scene.

  Further, by using the television receiver to which the present invention is applied, there is an effect that television broadcasting can be enjoyed without being restricted by time.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a television receiver to which the present invention is applied, and reference numeral 2 denotes a remote commander for operating the television receiver 1. An image is displayed on the screen 3. The television receiver 1 includes a hard disk drive unit 4. The program being received by the television receiver 1 is always recorded in the hard disk unit 4. In a television receiver equipped with such a hard disk drive unit 4, it is possible to play back a missed scene or a scene that the user wants to see again, or record and play back a desired program.

  FIG. 2 shows an example of the configuration of the remote commander 2 for operating such a television receiver 1. The remote commander 2 has various keys for performing basic settings of the television receiver 1, that is, a power switch 11 for turning on / off the power of the television receiver 1, and a channel setting. Channel keys 12, 12, 12,..., Channel up / down keys 13A and 13B, volume up / down keys 14A and 14B, and input source changeover switch 15 are arranged.

  Further, the remote commander 2 for operating the television receiver 1 to which the present invention is applied includes a program pause key 16 and a bookmark recording as various keys for controlling the hard disk drive unit 4 of the television receiver 1. Key 17, section repeat key 18, cancel key 19, reverse skip playback key 20, reverse high speed feed key 21, double speed key 22, forward high speed feed key 23, forward skip key 24, overview search key 25, arrow keys 26A and 26B, and an enter key 27 are provided.

  When the program pause key 16 is pressed, the receiving screen is stopped on the spot and displayed as a still image. Meanwhile, the program is recorded in the hard disk drive unit 4 of the television receiver 1. When the program pause key 16 is pressed again, the program recorded in the hard disk drive unit 4 is reproduced from the scene that is a still image.

  When the bookmark recording key 17 is pressed, the program broadcast at this time can be stored in the hard disk drive unit 4 of the television receiver 1. Repeat playback is set by the section repeat key 18. When the section repeat key 18 is pressed first, the repeat start position is set, and when the section repeat key 18 is pressed next, the repeat end position is set.

  The cancel key 19 is pressed when canceling a set operation or function.

  The reverse skip reproduction key 20, the reverse high speed feed key 21, the double speed key 22, the normal rotation high speed feed key 23, and the normal rotation skip key 24 are keys for performing variable speed reproduction. When the double speed key 22 is pressed during reproduction of a program recorded in the hard disk drive unit 4, the program is reproduced at double speed. Press again to return to normal speed playback. While the normal rotation high speed feed key 23 is being pressed, higher speed reproduction is performed. When the forward skip key 24 is pressed, the playback video is skipped. Further, while the reverse rotation high speed feed key 21 is pressed, reverse reproduction is performed at high speed. When the reverse skip playback key 20 is pressed, the playback video is skipped in the reverse direction.

  The overview search key 25, the arrow keys 26A and 26B, and the enter key 27 are used for program search. When the overview search key 25 is pressed, the screen 3 of the television receiver 1 is divided into a central screen and a plurality of surrounding small screens. On the surrounding small screen, a screen for every predetermined time is displayed from the screens recorded in the hard disk drive. When a desired screen is selected from a plurality of screens by operating the arrow keys 26A and 26B and a desired scene is searched, the enter key 27 is pressed. When the enter key 27 is pressed, playback starts from the selected screen.

  FIG. 3 shows an example of the configuration of the television receiver 1 to which the present invention is applied. In FIG. 3, the reception signal received by the antenna 51 is supplied to the tuner circuit 52. A channel setting signal is supplied from the system controller 50 to the tuner circuit 52. The tuner circuit 52 selects a signal of a desired reception channel based on the channel setting signal, and converts this signal into an intermediate frequency signal.

  The output of the tuner circuit 52 is supplied to the video intermediate frequency circuit 53. In the video intermediate frequency circuit 53, the intermediate frequency signal from the tuner circuit 52 is amplified, and this signal is video-detected. Thereby, for example, an NTSC composite video signal is obtained. This video signal is supplied to one input terminal 55 A of the video source changeover switch 55. Also, an audio signal is detected from a beat component of, for example, 4.5 MHz output from the intermediate frequency circuit 53. This output is supplied to the audio demodulation circuit 62.

  A video signal from the external video input terminal 56 is supplied to the other input terminal 55 B of the video source changeover switch 55. A select signal is supplied from the system controller 50 to the video source changeover switch 55. The video source changeover switch 55 switches between a video signal based on the received television broadcast and a video signal from the external video input terminal 56.

  The output of the video source changeover switch 55 is supplied to the video signal processing circuit 57. The video signal processing circuit 57 separates the luminance signal Y and the chroma signal C from the NTSC composite video signal, further demodulates the color difference signals U and V from the chroma signal C, and generates component video signals Y, U, and V. It is formed. The component video signals Y, U, and V are supplied to the terminal 58A of the switch circuit 58 and to the A / D converter 71. The output of the D / A converter 85 is supplied to the other input terminal 58B of the switch circuit 58.

  The switch circuit 58 is for switching between a screen based on a received television broadcast or a video signal from the external video input terminal 56 and a playback screen from the hard disk drive 80 (corresponding to the hard disk drive unit 4). is there. The switch circuit 58 is controlled by the recording / reproducing controller 77. That is, a control signal from the recording / reproducing controller 77 is supplied to the switch circuit 58 via the system controller 50. When a screen based on the received television broadcast or the video signal from the external video input terminal 56 is projected, the switch circuit 58 is switched to the terminal 58A side. When a reproduction screen is displayed from the hard disk drive 80, the switch circuit 58 is switched to the terminal 58B side.

  The output of the switch circuit 58 is supplied to the video output circuit 59. The video output circuit 59 drives a matrix circuit for forming the three primary color signals R, G, B from the component video signals Y, U, V from the switch circuit 58 and the three primary color signals R, G, B. And a video amplification circuit for supplying to the color picture tube 61. In the video output circuit 59, the component video signals Y, U, V from the switch circuit 58 are converted into the three primary color signals R, G, B and supplied to the color picture tube 61.

  The audio signal detected from the beat component of, for example, 4.5 MHz output from the intermediate frequency circuit 53 is supplied to the audio demodulation circuit 62. The audio demodulation circuit 62 demodulates the audio signal. This audio signal is supplied to the input terminal 63A of the audio source changeover switch 63.

  The audio signal from the external audio input terminal 64 is supplied to the other terminal 63B of the audio source changeover switch 63. The audio source changeover switch 63 selects an audio signal based on the received television broadcast and an audio signal from the external audio input terminal 64.

  The output of the audio source changeover switch 63 is supplied to the terminal 65A of the switch circuit 65 and also supplied to the A / D converter 75. The output of the D / A converter 87 is supplied to the other input terminal 65B of the switch circuit 65.

  The switch circuit 65 switches between the received television broadcast or the audio signal from the external audio input terminal 64 and the audio signal reproduced from the hard disk drive 80. The switch circuit 65 is controlled by a recording / reproducing controller 77. That is, a control signal from the recording / reproducing controller 77 is supplied to the switch circuit 65 via the system controller 50. When outputting the received television broadcast or the audio signal from the external audio input terminal 64, the switch circuit 65 is switched to the terminal 65A side. When outputting an audio signal from the hard disk drive 80, the switch circuit 65 is switched to the terminal 65B side.

  The output of the switch circuit 65 is supplied to the audio amplifier 66. The audio signal from the switch circuit 65 is amplified by the audio amplifier 66. This audio signal is supplied to the speaker 67.

  Component video signals Y, U, and V from the video signal processing circuit 57 are supplied to the A / D converter 71. The component video signal from the video signal processing circuit 57 is digitized by the A / D converter 71. The output of the A / D converter 71 is supplied to the field memory 72. In this embodiment, video data is thinned at a thinning rate of 1/4. Accordingly, video data is written in the field memory 72 every four fields.

  The output of the field memory 72 is supplied to the image compression circuit 73. The component video signal is compressed by the image compression circuit 73. As an image compression method, for example, motion JPEG is used. The video data compressed by the image compression circuit 73 is temporarily written in a buffer memory 74 composed of, for example, FIFO (First In, First Out).

  The audio signal from the audio source switching circuit 63 is supplied to the A / D converter 75. In the A / D converter 75, the audio signal from the audio source switching circuit 63 is digitized. The output of the A / D converter 75 is supplied to the audio compression circuit 76. The audio compression circuit 76 compresses the audio signal. As an audio compression method, for example, non-linear PCM is used. The audio signal compressed by the audio compression circuit 76 is temporarily written in a buffer memory 95 made of, for example, FIFO (First In, First Out).

  Based on the control of the recording / reproducing controller 77, video data and audio data are read from the buffer memories 74 and 95. These read data are written to the hard disk drive 80 via the bus 78.

  The writing of data to the hard disk drive 80 involves writing a set of data in which thinned video data for one field and audio data corresponding to four consecutive fields starting from this video data are combined. Made as a unit. The audio data for four consecutive fields is stored at the head, and the corresponding video data for one field is stored behind it. With respect to the address of the hard disk drive 80, this set of data is continuously arranged in time series.

  Video data and audio data recorded on the hard disk drive 80 are reproduced under the control of the recording / reproducing controller 77. In this reproduction, audio data and video data are first read in the order in which they are written in units of pairs of audio data and video data, and then video data is read.

  In this embodiment, data is written to and read from the hard disk drive 80 in parallel. This is done by time division processing for writing and reading. That is, in this example in which the thinning rate of video data is 1/4, audio data for four fields and video data for one field are written every four fields. There is an interval t between the end of writing and the start of the next writing. Reading is performed between the end of data writing and the start of the next writing. An interval t ′ that takes into consideration the seek time of the hard disk drive 80 and the rotation waiting time is provided between writing to reading and reading to writing.

  Further, at the time of reading, by appropriately controlling the address of the read data by the above-mentioned data unit, stepped variable speed reproduction can be performed. That is, if the data is read continuously, it is reproduced at 1 × speed (normal speed), and if every other data is read, it is reproduced at 2 × speed. Similarly, by reading every other two, it is possible to reproduce at 3 × speed.

  The audio data read out and reproduced from the hard disk drive 80 is temporarily written in the buffer memory 96 made of, for example, FIFO via the bus 78. Similarly, video data read out and reproduced from the hard disk drive 80 is temporarily written into a buffer memory 81 made of, for example, a FIFO via the bus 78.

  Based on the control of the recording / reproducing controller 77, video data is read from the buffer memory 81. Since the video data is thinned at a thinning rate of ¼, the same data is repeatedly read from the buffer memory 81 for four fields. The read video data is supplied to the image decompression circuit 82. Component video data Y, U, and V are formed from video data compressed by, for example, motion JPEG by the image decompression circuit 82. The output of the image decompression circuit 82 is supplied to a D / A converter 85 via an image processing circuit 83 and a field memory 84 for forming a multi-screen. The digital video signal is converted into an analog video signal by the D / A converter 85. The output of the D / A converter 85 is supplied to the terminal 58B of the switch circuit 58.

  Also, audio data is read from the buffer memory 96 based on the control of the recording / reproducing controller 77. The read audio data is supplied to the audio decompression circuit 86. The output of the audio decompression circuit 86 is supplied to the D / A converter 87. The digital audio signal is converted into an analog audio signal by the D / A converter 87. The output of the D / A converter 87 is supplied to the terminal 65B of the switch circuit 65.

  The system controller 50 performs overall control of the television receiver 1. The system controller 50 and the recording / playback processing controller 77 are connected bidirectionally. A RAM 79 is connected to the bus 78 as a work for the recording / reproducing controller 77.

  An input from the remote commander 2 is given to the system controller 50 via the light receiving unit 92. Various operations are set based on the input from the remote commander 2. The output of the system controller 50 is supplied to the display generation circuit 94. From the display generation circuit 94, display signals indicating various operation setting states are generated. The output of the display generation circuit 94 is supplied to the video output circuit 59, and various operation states are displayed on the screen.

Next, a data reproducing operation from the hard disk drive 80 according to the present invention will be described. FIG. 4 shows an example in which while viewing a real-time broadcast, the video is traced back in response to a user request, and video data and audio data are reproduced and viewed from an arbitrary scene. Initially, the switch circuits 58 and 65 are terminals 58A and 65A respectively selected, is shown in Figure 4A with the screen 3 (television picture tube 61), the video real-time broadcasting interval a _0, a _1, ··· The sound based on the real-time broadcast is reproduced from the speaker 67.

For example, it is assumed that the user wants to play back the video at the point A at the beginning of the section a ₁ . At time A, the reverse high-speed feed key 21 of the remote commander 2 is pressed. This command is received by the light receiving unit 92 and supplied to the recording / reproducing controller 77 via the system controller 50. Reading of the hard disk drive 80 is controlled by the recording / reproduction controller 77, and reverse reproduction at high speed is performed (FIG. 4B). At the same time, based on the control of the system controller 50, the terminals 58B and 65B are selected by the switch circuits 58 and 65, respectively. The video displayed on the screen 3 is switched from the video by real-time broadcasting to the video reproduced from the hard disk drive 80 (time A in FIG. 4C).

The user views the images issued movies are played at high speed by reversing the screen 3 (in this example, the beginning of the section a ₁₎ point B a scene desired appeared release the reverse fast feed key 21. Then, this is notified to the recording / reproducing controller 77 via the system controller 50, and data is read from the hard disk drive 80 at the normal speed. The video reproduced at the normal speed from the section a ₁ is displayed on the screen 3.

When the reproduction of the desired section a ₁ is completed, the user presses the cancel key 19 of the remote commander 2, for example, to return to the video by the real-time broadcast at the time C, for example. A command by the cancel key 19 is supplied to the system controller 50, and the terminals 58A and 65A are selected in the switch circuits 58 and 65, respectively. As a result, the video displayed on the screen 3 is switched from the video reproduced from the hard disk drive 80 to the video based on real-time broadcasting. The screen 3, the video from the segment a ₄ by real-time broadcast issued movies. At the same time, the recording / reproducing controller 77 is instructed to stop reading data from the hard disk drive 80.

FIG. 5 schematically shows an example of disk access when reverse playback is performed. Video and audio signals are provided as shown in FIGS. 5A and 5B. In this figure, sections r ₀ , r ₁ ,..., Sections s ₀ , s ₁ ,. The input video signal and audio signal are subjected to processing such as compression encoding in real time to be converted into video data and audio data, respectively, and written into the hard disk drive 80. As described above, writing is performed every four fields. The video data of the first 1 field in 4 fields and the audio data for 4 fields are written as a set and recorded (FIG. 5C).

At time A, the reverse high-speed feed key 21 is pressed. The time point A is an arbitrary point between the four fields from when data is written to the hard disk drive 80 until the next data is written, for example, when viewed in field units. When the first writing after the key 21 is pressed (audio data s _{24 to} s ₂₇ , video data r ₂₄ ) is completed, reading is started at a predetermined interval t ′. First, the data written immediately before, that is, the audio data s _{24 to} s ₂₇ and the video data r ₂₄ are read (FIG. 5D). The read data is reproduced in synchronization with the field immediately after the reading is finished (FIGS. 5E and 5F).

  Thereafter, until the reverse high-speed feed key 21 is released, the data moves in the reverse direction in time series, and data is skipped at a predetermined interval for reading. In this example, two pieces of data are skipped and reproduced in reverse at a triple speed.

  At time B, the reverse high-speed feed key 21 is released. The time point B is an arbitrary point between four fields from the time when data is read from the hard disk drive 80 to the time when the next reading is performed, for example. The next reading after the point B when the key 21 is released continues the reading based on the reverse high-speed feed. With this reading as a starting point, 1 × speed playback is started. Thereafter, data is sequentially read until the cancel key 19 is pressed.

  By controlling the access to the hard disk drive 80 in this way, as shown in FIG. 5G, a video by high-speed reversal is displayed following a video by real-time broadcasting. Double speed playback starts. Also in other reproduction methods described later, writing and reading of the hard disk drive 80 are controlled following this control.

  6 is similar to the example shown in FIG. 4 described above. While viewing a real-time broadcast, the video is traced back in response to a user request, video data and audio data are reproduced from an arbitrary scene, and then a fast-forward search ( This is an example in which playback at a speed exceeding 1 × speed is performed and the playback video is caught up with video by real-time broadcasting. When the reproduced video catches up with the video by real-time broadcasting, the video output is switched from the reproduced video from the hard disk drive 80 to the video by real-time broadcasting.

  In this case, for example, the high-speed normal rotation reproduction key 23 is pressed at the time point C after high-speed reverse reproduction and 1-time reproduction are performed as described above. Then, the system controller 50 instructs the recording / reproducing controller 77 to perform high-speed normal rotation reproduction. Based on the control of the recording / reproducing controller 77, high-speed reproduction is performed in the hard disk drive 80.

Following the section a ₁ , the sections a ₂ , a ₃ ,... Are continuously reproduced at high speed (FIG. 6B). When the reproduced video catches up with the video by the real-time broadcast, the switch circuits 58 and 65 are switched from the terminal 58B and the terminal 65B to the terminal 58A and the terminal 65A. In this example, the video catches up at time D when high-speed playback of the section a ₅ is finished, and is switched to the video by the real-time broadcast in the section a ₆ . Whether the reproduced video has caught up with the video by real-time broadcasting can be determined by, for example, whether the write address and the read address are close or the same.

  FIG. 7 shows an example in which a video is paused (paused) during playback of a real-time broadcast video, a still image is displayed, and the video following the pause video is continuously played when the pause is released. is there. When the program pause key 16 of the remote commander 2 is pressed at time A, the terminal 58B is selected in the switch circuit 58, and the video data written in the field memory 84 is repeatedly read out when the pause is designated. In the case of a pause, the audio amplifier 66 is controlled by the system controller 50 and muted.

  When the program pause key 16 is pressed again, the pause state is released (time point B). When the pause state is released, the data following the point A when the pause is designated is sequentially read from the hard disk drive 80 and reproduced.

  The pause video may be displayed by reading the data written in the hard disk drive 80 immediately before the time A. The read video data is written into the field memory 84 via the image expansion circuit 82 and the screen processing circuit 83. During the pause period t, the video data synchronized with the field and written in the field memory 84 is repeatedly read out and reproduced.

  FIG. 8 shows an example in which, after the pause is canceled, fast-forward search or playback at a speed exceeding 1 × speed is performed to catch up the playback video with the video by real-time broadcasting. In this example, after the pause is released, following the example described with reference to FIG. 6 described above, high-speed normal rotation reproduction or reproduction at a speed exceeding 1 × is performed, and the reproduced video catches up with the video by real-time broadcasting. The video output is switched from the reproduced video from the hard disk drive 80 to the video by real-time broadcasting.

  Next, display of the screen 3 according to this embodiment will be described. When the playback video from the hard disk drive 80 is displayed on the screen 3 as described above, if the user does not notify that fact by any method, the user will endlessly display the playback video from the hard disk drive 80 without knowing it. There is a risk of continuing to watch. Here, the notification is performed by displaying on the screen 3. The display on the screen 3 described below is generated by the display generation circuit 94 based on the control of the system controller 50 and synthesized with the output of the switch circuit 58 by the video output circuit 59.

  FIG. 9 shows an example in which a playback video is displayed on the entire screen 3. FIG. 9A is an example in which the time difference Δt between the video by the real-time broadcast and the playback video is displayed as a time difference display 100 by a character character at a predetermined position on the screen 3 on which the playback video is projected. The time difference Δt can be obtained from the address of data read from the hard disk drive 80, for example.

  FIG. 9B is an example in which the time difference Δt displayed by the character character in FIG. 9A is expressed by icons 101 and 102. An icon 101 represents the current time and is fixedly displayed. The icon 102 represents the time when the playback video currently displayed on the screen 3 is written to the hard disk drive 80. That is, the interval between the icon 101 and the icon 102 is the time difference Δt. Therefore, this interval becomes wider when high-speed reverse playback is being performed or in the pause state. Conversely, when high-speed normal rotation reproduction or reproduction at a speed exceeding 1 × speed is being performed, the icon 102 moves in a direction in which this interval approaches. In the case of 1 × speed reproduction, the interval does not change.

  The display 103 indicates a change in time, and the display always changes as if moving from right to left. This is used in combination with the icon 101 to express how the time changes every moment. Further, it is more preferable that the icons 101 and 102 are designed not to be simple symbols as shown in the figure but to have meanings.

  FIG. 9C is an example in which a frame 104 indicating that a playback video is currently being displayed is displayed on the outermost periphery of the screen 3. Note that the displays shown in FIGS. 9A to 9C are not displayed when an image based on real-time broadcasting is displayed. Further, the displays shown in FIGS. 9A to 9C can be combined with each other.

  FIG. 10 shows an example of display by the twin picture method. In this twin picture system, as shown in FIG. 10A, the screen 3 is divided into a main screen 3A and a sub screen 3B, and different images are displayed. In this example, a video by real-time broadcasting is displayed on the main screen 3A, and a reproduced video is displayed on the sub-screen 3B.

  FIGS. 10B, 10C, and 10D correspond to FIGS. 9A, 9B, and 9C, respectively. That is, in FIG. 10B, the time difference display 100 is displayed on the sub-screen 3B. In the example shown in FIG. 10C, an icon 101 indicating the current time and an icon 102 indicating the writing time of the playback video to the hard disk drive 80 are displayed on the sub-screen 3B, and a display 103 indicating a change in time is further displayed. The In FIG. 10D, a frame 104 indicating that a reproduced video is displayed is displayed on the outermost periphery of the sub-screen 3B.

  FIG. 11 shows an example of display by the PIP (Picture in Picture) system. In this PIP method, a child screen 3C having a size smaller than that of the parent screen 3D is arranged in the parent screen 3D with respect to the screen 3. In this example, a playback video is displayed on the main screen 3D, and a video by real-time broadcasting is displayed on the sub-screen 3C. This display can be reversed. FIGS. 11B, 11C, and 11D correspond to FIGS. 9A, 9B, and 9C, respectively, and even in the display by the PIP method, the parent screen 3D on which the playback video is displayed is similar to the above. A display indicating that the displayed screen is a reproduced video is displayed.

  In addition, in the display by the twin picture system or the PIP system, the video data read and reproduced from the hard disk drive 80 and the video data read from the field memory 72 are displayed by the screen processing circuit 83 and the field memory 84. Obtained by synthesis.

It is a basic diagram which shows embodiment of this invention. It is a basic diagram which shows an example of a structure of the remote commander for operating a television receiver. 1 is a block diagram illustrating an example of a configuration of a television receiver to which the present invention is applied. It is a basic diagram which shows the example which reproduces | regenerates and views video data and audio data from arbitrary scenes. It is a figure which shows roughly about the example of the disk access in the case of performing reverse reproduction | regeneration. It is a basic diagram which shows the example which catches up reproduction | regeneration image | video with the image | video by real-time broadcasting. It is a basic diagram which shows the example which paused the image | video by real-time broadcasting and reproduce | regenerated the image | video following a pause image | video after a pause cancellation | release. It is a basic diagram which shows the example which catches up reproduction | regeneration image | video with the image | video by real-time broadcasting after a pause is cancelled | released. It is a basic diagram which shows the example which notifies that it is a reproduction | regeneration image | video when a reproduction | regeneration image | video is projected on the whole screen. It is a basic diagram which shows the example which notifies that it is a reproduction | regeneration image | video at the time of using a twin picture system. It is a basic diagram which shows the example which notifies that it is a reproduction | regeneration video at the time of using a PIP system. It is a basic diagram which shows an example of operation | movement of the television receiver which records a program on a recording medium continuously by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Television receiver 2 Remote commander 3 Screen 4 Hard disk drive part 16 Program pause key 19 Cancel key 21 High speed reverse reproduction key 23 High speed forward reproduction key 50 System controller 58, 65 Switch circuit 74, 81, 95, 96 Buffer memory 77 Recording / Playback controller 80 Hard disk drive

Claims (6)

A recording medium for continuously recording the received television broadcast;
Recording medium control means for controlling the recording to the recording medium and the reproduction from the recording medium to be performed in parallel;
A first graphic indicating first time information corresponding to the current time, and second time information corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium The difference between the first time information and the second time information is obtained by using a second graphic indicating the time axis by indicating a change in time by changing the display. The first graphic is displayed visually by the interval between the first graphic and the second graphic, and the first graphic is fixedly displayed at one end of the third graphic, and is reproduced from the recording medium and is currently displayed. Display control means for controlling the second graphic to move along the third graphic in synchronization with the video
The recording medium control means, during reception of the television broadcast, at a first speed from the position recorded immediately before to the recording medium to an arbitrary position in the reverse direction in time series. The playback is performed, and the playback is performed at a second speed different from the first speed from the arbitrary position toward the positive direction in time series,
The display control means controls to display the video reproduced in the reverse direction in time series at the first speed, and designates the position to be reproduced in the positive direction in time series. Te revision broadcasting receiving apparatus. The television broadcast receiver according to claim 1, wherein
The recording medium control means, after performing the reproduction at the second speed, further performs the reproduction at a third speed until the reproduction catches up with the television broadcast. apparatus. Continuously recording received television broadcasts on a recording medium;
A recording medium control step for controlling the recording to the recording medium and the reproduction from the recording medium in parallel;
A first graphic indicating first time information corresponding to the current time, and second time information corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium The difference between the first time information and the second time information is obtained by using a second graphic indicating the time axis by indicating a change in time by changing the display. The first graphic is displayed visually by the interval between the first graphic and the second graphic, and the first graphic is fixedly displayed at one end of the third graphic, and is reproduced from the recording medium and is currently displayed. A display control step for controlling the second graphic to move along the third graphic in synchronization with the video
In the recording medium control step, during reception of the television broadcast, a first speed from a position recorded immediately before to the recording medium to an arbitrary position in a time-series reverse direction. And replaying at a second speed different from the first speed from the arbitrary position toward the positive direction in time series,
In the display control step , control is performed so as to display an image reproduced in the reverse direction in time series at the first speed, and a position to be reproduced in the positive direction in time series is designated. Te revision broadcast receiving method you. A recording medium for continuously recording the received television broadcast;
Recording medium control means for controlling the recording to the recording medium and the reproduction from the recording medium to be performed in parallel;
Still image display control means for controlling to display the image by the television broadcast stationary,
A first graphic indicating first time information corresponding to the current time, and second time information corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium The difference between the first time information and the second time information is obtained by using a second graphic indicating the time axis by indicating a change in time by changing the display. The first graphic is displayed visually by the interval between the first graphic and the second graphic, and the first graphic is fixedly displayed at one end of the third graphic, and is reproduced from the recording medium and is currently displayed. Display control means for controlling the second graphic to move along the third graphic in synchronization with the video
The recording medium control means, Te revision broadcast receiving apparatus from the scene corresponding to the time obtained by the still after the stationary is released and to perform the playback. The television broadcast receiver according to claim 4, wherein
The television broadcast receiver according to claim 1, wherein the recording medium control means performs the reproduction at a predetermined speed until the reproduction after the rest is released catches up with the television broadcast. Continuously recording received television broadcasts on a recording medium;
A recording medium control step for controlling the recording to the recording medium and the reproduction from the recording medium in parallel;
A step of controlling the television broadcast video to be displayed in a stationary manner;
A first graphic indicating first time information corresponding to the current time, and second time information corresponding to the time when the video reproduced from the recording medium and currently displayed is recorded on the recording medium The difference between the first time information and the second time information is obtained by using a second graphic indicating the time axis by indicating a change in time by changing the display. The first graphic is displayed visually by the interval between the first graphic and the second graphic, and the first graphic is fixedly displayed on one end of the third graphic, and is reproduced from the recording medium and is currently displayed. A step of display control for controlling the second graphic to move along the third graphic in synchronization with the video
The recording medium control step, Te revision broadcast receiving method to perform the reproduction from the scene corresponding to the time obtained by the still after the stationary is released.

Images