JP2006115405A - Advertisement signal detector and recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a CM detection technique which is available regardless of kinds or forms of television broadcast signals and has versatility. <P>SOLUTION: When a CM deletion mode is set, a control unit 2 outputs, to an advertisement signal detection unit 6, an instruction to detect an advertisement signal contained in a television broadcast signal designated by the user. In accordance with this instruction, the advertisement signal detection unit 6 reads out I frames contained in the television broadcast signal recorded on a recording medium and designated by the user, compares the I frames with one another and determines the presence/absence of the same I frame. When the same I frames are present, the advertisement signal detection unit 6 recognizes, as an advertisement signal, signals of 15 sec from starts of the same I frames and stores a starting address and an ending address of the advertisement signal, as the result of the detection, in a memory. The control unit 2 inputs, to a recording unit 4, the starting address and the ending address stored in the memory and outputs an instruction to delete the advertisement signal designated by the user. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an advertisement signal detection device that detects an advertisement signal included in a television broadcast signal and a recording / reproduction device including the advertisement signal detection device.

  Some recording / reproducing apparatuses that record and reproduce television broadcast signals have a function (so-called CM cut function) that records only the main part of a television broadcast and does not record an advertisement (CM) part. This function is realized, for example, by distinguishing a bilingual (main / sub) audio signal from a stereo audio signal.

  Also, focusing on the fact that streaming delivery using advanced digital technology is possible in digital broadcasting, etc., information indicating the CM insertion position is added to the content data delivered from the broadcast station, and the receiving side In some cases, the insertion position of the CM is determined based on the added information, and the CM can be removed (see Patent Document 1).

  Further, at the time when the CM is started and when it is ended, the user performs notification by a button operation or the like, and the recording / reproducing apparatus recognizes the CM by this notification and skips the CM at the time of reproduction. Some have been made (see Patent Document 2).

JP 2001-245242 A JP 2003-143544 A

  The method of cutting the CM by distinguishing bilingual (main / sub) audio signals and stereo audio signals is effective for recording movies and overseas dramas that use bilingual audio, but other contents Not available for Also, the method of adding information indicating the CM insertion position or the like to the content data sent from the broadcast station is a special method established under a contract with the broadcast station and is difficult to realize. In addition, the method of Patent Document 2 places a burden on the user.

  The present invention has been made based on such considerations, and an object thereof is to provide a versatile CM detection technique that can be used regardless of the type and format of a television broadcast signal.

  The advertisement signal detection apparatus of the present invention is an advertisement signal detection apparatus that detects an advertisement signal included in a television broadcast signal recorded on a recording medium, and whether the same signal exists in the television broadcast signal. Determination means for determining whether or not, and when the determination means determines that the same signal exists, an advertisement signal recognition means for recognizing the same signal as the advertisement signal.

  With this configuration, it is possible to provide a versatile CM detection technique that can be used regardless of the type and format of the television broadcast signal.

  The recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording a designated television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium, wherein the advertisement signal detecting apparatus And an advertisement signal deleting means for deleting the advertisement signal detected by the advertisement signal detecting device from the designated television broadcast signal from the recording medium.

  With this configuration, the advertisement signal can be deleted from the recorded television broadcast signal.

The recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording a designated television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium, wherein the advertisement signal detecting apparatus And recording means for recording the television broadcast signal on the recording medium;
Reproducing means for reproducing a television broadcast signal recorded on the recording medium, and the reproducing means detects the television broadcast signal recorded on the recording medium from the television broadcast signal, and detects the advertisement signal. The advertisement signal detected by the device is reproduced while being skipped.

  With this configuration, the recorded television broadcast signal can be reproduced while skipping the advertisement signal included therein.

  The recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording a television broadcast signal on a recording medium and reproducing a television broadcast signal recorded on the recording medium, the advertising signal detecting apparatus, Recording means for recording the television broadcast signal for a period and the designated television broadcast signal on the recording medium, and the advertisement signal detection device detects the advertisement signal included in the television broadcast signal for the predetermined period. An advertisement signal database for recording the advertisement signal, and the recording means includes the advertisement signal when the designated television broadcast signal includes the advertisement signal recorded in the advertisement signal database. The television broadcast signal is recorded on the recording medium.

  With this configuration, when a television broadcast signal is recorded, the recording can be performed while deleting the advertisement signal included therein.

  The recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording a television broadcast signal on a recording medium and reproducing a television broadcast signal recorded on the recording medium, the advertising signal detecting apparatus, Recording means for recording the television broadcast signal for a period and the designated television broadcast signal on the recording medium, and recording the advertisement signal detected by the advertisement signal detection device from the television broadcast signal for the predetermined period Advertisement signal database, and playback means for playing back the television broadcast signal recorded on the recording medium, wherein the playback means is recorded in the advertisement signal database as the television broadcast signal to be played back. When a certain advertisement signal is included, the television broadcast signal is reproduced while skipping the advertisement signal.

  With this configuration, the recorded television broadcast signal can be reproduced while skipping the advertisement signal included therein.

  According to the present invention, it is possible to provide a versatile CM detection technique that can be used regardless of the type and format of a television broadcast signal.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a schematic configuration of a recording / reproducing apparatus for explaining a first embodiment of the present invention. As the recording / reproducing apparatus in FIG. 1, a digital recording type optical disk recorder, a hard disk recorder, a type of recorder using both an optical disk and a hard disk, and the like are assumed.

  As shown in FIG. 1, a recording / reproducing apparatus 100 includes a receiving unit 1, a control unit 2 that performs overall control of the recording / reproducing apparatus 100, an operation unit 3, a recording unit 4, a recording medium 5, and advertisement signal detection. A unit 6 (corresponding to the advertising signal detection device in claims), a playback unit 7 and an output unit 8 are provided.

  The receiving unit 1 receives a television broadcast signal received from a broadcasting station, and includes, for example, an antenna and a tuner. In the present embodiment, the television broadcast signal transmitted from the broadcast station is described as MPEG digital data. However, the present invention is not limited to this, and the television broadcast signal transmitted from the broadcast station may be analog. . In this case, the television broadcast signal may be input to the control unit 2 after being received by the receiving unit 1, digitally converted and compressed into the MPEG format.

  MPEG digital data is composed of an intra frame (I frame) that can reproduce video by itself and a difference frame that is difference data between the intra frame, and a plurality of I frames to the next I frame as one unit. This data contains the units. Since the advertisement signal is an independent signal from the main part, the television broadcast signal in the MPEG format is characterized in that an I frame is always arranged at the head of the advertisement signal.

  The operation unit 3 includes keys, buttons, and the like for performing various operations of the recording / reproducing apparatus 100, and an instruction corresponding to the operation here is input to the control unit 2.

  The recording unit 4 records and deletes the television broadcast signal in the storage medium 5 under the control of the control unit 2.

  The recording medium 5 is, for example, a hard disk or a DVD.

  The advertisement signal detection unit 6 detects an advertisement signal (hereinafter also referred to as CM) included in the television broadcast signal recorded on the recording medium 5 under the control of the control unit 2. The CM is provided by the sponsor of the program, and the content of the sponsor's CM that is run at the same time is the same. And, the same CM of the provider may repeatedly flow in one program, or the same CM repeatedly flows on the channel of each broadcasting station, for example, when considered in units of one day (24 hours) . On the other hand, the main program broadcast will not be repeated. Therefore, in this embodiment, paying attention to the repetitive appearance of CM, the advertisement signal detection unit 6 determines whether or not there is a signal that appears repeatedly in the television broadcast signal, and the signal that appears repeatedly. Is detected as a CM, and the CM is detected.

FIG. 2 is a block diagram illustrating a schematic configuration of the advertisement signal detection unit 6.
As shown in FIG. 2, the advertisement signal detection unit 6 includes an identical signal presence / absence determination unit 61, an advertisement signal recognition unit 62, and a memory 63 such as a RAM.

  The same signal presence / absence determination unit 61 compares I frames included in the television broadcast signal recorded on the recording medium 5 and determines whether or not the same I frame exists in these I frames. For example, when there are four I frames, A, B, C, and D, the same signal presence / absence determination unit 61 compares A with each of B, C, and D, and compares B with each of C and D. C and D are compared. For example, when A and D are the same, the fact is notified to the advertisement signal recognition unit 62.

  As a comparison method between I frames, there are a comparison between attributes of I frames and a direct comparison of signals between I frames. Here, the attribute is, for example, the number of times that the luminance of the video is largely converted, timing information thereof, and the like.

  When there is the same I frame, the advertisement signal recognition unit 62 recognizes that a signal for a predetermined period starting from these I frames is the advertisement signal. CMs are broadcast in multiples of 15 seconds. For this reason, when there is the same I frame, it can be recognized that a signal for 15n (n is a positive integer) seconds from the start of the I frame is an advertisement signal. In general, since most CMs are 15 seconds, in this embodiment, a signal for 15 seconds from the start of the same I frame is recognized as an advertisement signal.

  In this embodiment, when I frames are compared, and there is an identical I frame, a signal for 15 seconds from the start of the I frame is recognized as an advertisement signal. All signals including all I frames and all difference frames may be compared, and when there are identical signals, they may be recognized as advertisement signals. When comparing only I frames, there is an advantage that the amount of calculation can be reduced.

  In this embodiment, the advertisement signal is detected by comparing image data. However, the advertisement signal may be detected by comparing audio data. In this case, the audio data may be compared with each other based on the number of times the audio level of the audio data exceeds the threshold, the timing thereof, or the like.

  When the advertisement signal recognition unit 62 recognizes the advertisement signal, the advertisement signal recognition unit 62 stores the start address and the end address of the advertisement signal in the area on the recording medium 5 in which the television broadcast signal that is the detection target of the advertisement signal is recorded in the memory 63. To remember. Information stored in the memory 63 can be read out by the control unit 2.

  The reproduction unit 7 reproduces a television broadcast signal recorded on the recording medium 5 under the control of the control unit 2, generates reproduction data, and outputs it to the output unit 8.

  The output unit 8 is configured by a display, a speaker, or the like that outputs the reproduction data from the reproduction unit 7.

  The recording / reproducing apparatus 100 is configured to record a television broadcast signal designated by the user on the recording medium 5 and a reproduction mode to reproduce the television broadcast signal designated by the user recorded on the recording medium 5. The CM deletion mode for deleting the advertisement signal from the television broadcast signal recorded on the recording medium 5 can be set. Hereinafter, the operation in each mode will be described.

  When the operation unit 3 is operated and set to the recording mode, the control unit 2 sends the television broadcast signal designated by the user received by the receiving unit 1 to the recording unit 4 and instructs to record it on the recording medium 5. Put out. The recording unit 4 records the television broadcast signal on the recording medium 5 in accordance with this instruction. On the other hand, when the operation unit 3 is operated and set to the reproduction mode, the control unit 2 reproduces the television broadcast signal designated by the user among the television broadcast signals recorded on the recording medium 5. An instruction is given to the playback unit 7. In accordance with this instruction, the playback unit 7 reads a television broadcast signal designated by the user from the recording medium 5, generates playback data, and outputs the playback data to the output unit 8. The output unit 8 outputs video, audio, and the like through a display, a speaker, and the like.

Next, the operation in the CM deletion mode will be described.
FIG. 3 is a diagram showing an operation flow in the CM deletion mode of the recording / reproducing apparatus 100 for explaining the first embodiment of the present invention.
When the operation unit 3 is operated to set the CM deletion mode (S31), the control unit 2 instructs the advertisement signal detection unit 6 to detect the advertisement signal included in the television broadcast signal designated by the user. Put out. In accordance with this instruction, the advertisement signal detection unit 6 reads out the I frame included in the television broadcast signal designated by the user recorded in the recording medium 5 (S32), compares the I frames, and compares them with each other. The presence / absence of an I frame is determined (S33). When the same I frame exists (S33: YES), the advertisement signal detection unit 6 detects the advertisement signal by recognizing the signal for 15 seconds from the start of the same I frame as the advertisement signal (S34). Are stored in the memory 63 as detection results.

  The control unit 2 reads out the start address and the end address stored in the memory 63, inputs them to the recording unit 4, and issues an instruction to delete the advertisement signal included in the television broadcast signal designated by the user. In accordance with this instruction, the recording unit 4 deletes the signal from the start address to the end address input from the control unit 2 among the television broadcast signals specified by the user recorded on the recording medium 5 (S35). ).

  As described above, according to the present embodiment, it is determined whether or not the same signal is present in the television broadcast signal, and if there is, the same signal is recognized as the advertisement signal and the advertisement is performed. The signal is detected. For this reason, it is not necessary to add special information to the television broadcast signal or to perform troublesome operations by the user as in the past, and it can be used regardless of the type and format of the television broadcast signal. A versatile CM detection technique can be realized.

  In the present embodiment, the operation of deleting the advertisement signal included in the television broadcast signal once recorded on the recording medium 5 has been described. However, when the television broadcast signal is reproduced without deleting the advertisement signal. In addition, the advertisement signal can be skipped for reproduction. In this case, the control unit 2 instructs the advertisement signal detection unit 6 to detect the advertisement signal included in the television broadcast signal to be skipped and obtains the start address and end address of the detected advertisement signal. Then, it is input to the playback unit 7 to instruct the skip playback of the television broadcast signal to be skipped. The playback unit 7 may not generate playback data for a signal between the start address and the end address input from the control unit 2 among the television broadcast signals to be skip-played.

(Second embodiment)
The recording / reproducing apparatus for explaining the present embodiment is different from the recording / reproducing apparatus explained in the first embodiment in that an advertisement signal database (DB) for recording advertisement signals is provided.

FIG. 4 is a diagram showing a schematic configuration of a recording / reproducing apparatus for explaining the second embodiment of the present invention. In FIG. 4, the same components as those in FIG.
As shown in FIG. 4, the recording / reproducing apparatus 200 includes a receiving unit 1, a control unit 2 that performs overall control of the recording / reproducing apparatus 200, an operation unit 3, a recording unit 4, a recording medium 5, and an advertisement signal detection. Unit 6, playback unit 7, output unit 8, and advertisement signal DB 9 are provided.

  The advertisement signal detection unit 6 detects an advertisement signal included therein from a television broadcast signal for a predetermined period (for example, one day) recorded in the recording medium 5 in the same manner as in the first embodiment, The detected advertisement signal is recorded in the advertisement signal DB 9. The advertisement signal detection unit 6 has a configuration in which the memory 64 is omitted from the configuration shown in FIG.

  The recording / reproducing apparatus 200 records a television broadcast signal designated by the user on the recording medium 5 and a reproduction mode for reproducing the television broadcast signal designated by the user recorded on the recording medium 5. The advertisement signal DB creation mode for creating the advertisement signal database and the CM deletion mode for deleting the advertisement signal from the television broadcast signal recorded on the recording medium 5 can be set. Hereinafter, the operation in each mode will be described. The operations in the recording mode and the reproduction mode are the same as in the first embodiment.

FIG. 5 is a diagram showing an operation flow in the advertisement signal DB creation mode of the recording / reproducing apparatus for explaining the second embodiment of the present invention.
When the operation unit 3 is operated to set the advertisement signal DB creation mode (S51), the control unit 2 controls the recording unit 4 to transmit a television broadcast signal for a predetermined period (for example, one day) to the recording medium 5. (S52). When the recording ends, the control unit 2 instructs the advertisement signal detection unit 6 to detect the advertisement signal from the recorded television broadcast signal for one day. In accordance with this instruction, the advertisement signal detection unit 6 reads all I frames of the recorded television broadcast signal for one day (S53), compares the I frames, and determines the presence or absence of the same I frame. (S54). When the same I frame exists (S54: YES), the advertisement signal detection unit 6 detects the advertisement signal by recognizing the signal for 15 seconds from the start of the same I frame as the advertisement signal (S55). The advertisement signal is recorded in the advertisement signal DB 9 (S56).

  Next, when the operation unit 3 is operated and set in the CM deletion mode, the control unit 2 deletes the advertisement signal included therein from the television broadcast signal designated by the user with respect to the recording unit 4. Give instructions. In accordance with this instruction, the recording unit 4 refers to the advertisement signal DB 9, and if the television broadcast signal designated by the user includes the advertisement signal recorded in the advertisement signal database, it is recorded in the recording medium 5. The same signal as the advertisement signal recorded in the advertisement signal DB 9 is deleted from the television broadcast signal designated by the user. On the other hand, when the television broadcast signal designated by the user does not include the advertisement signal recorded in the advertisement signal database, the advertisement signal is not deleted.

  As described above, according to the present embodiment, the advertisement signal included in the television broadcast signal for one day is stored in a database, and the advertisement signal is deleted from the already recorded television broadcast signal using the database. Can do. In the first embodiment, for example, after a television broadcast signal for 2 hours is recorded, an advertisement signal is detected and deleted from the recorded television broadcast signal. Therefore, there is a CM that was broadcast only once in 2 hours. If this happens, the CM cannot be deleted. However, in this embodiment, since the advertisement signal is detected from the television broadcast signal for one day, more CMs can be detected and recorded, and CM deletion performance can be improved. it can.

  In the present embodiment, the operation of deleting the advertisement signal included in the television broadcast signal once recorded on the recording medium 5 has been described. However, when the television broadcast signal is reproduced without deleting the advertisement signal. In addition, the advertisement signal can be skipped for reproduction. In this case, the control unit 2 issues a skip reproduction instruction to the reproduction unit 7. Then, the reproduction unit 7 refers to the advertisement signal DB 9, and when the television broadcast signal designated by the user includes the advertisement signal recorded in the advertisement signal database, the advertisement signal is included in the television broadcast signal. No reproduction data is generated for the same signal as the advertisement signal recorded in the DB 9. On the other hand, when the television broadcast signal designated by the user does not include the advertisement signal recorded in the advertisement signal database, the advertisement signal is not skipped.

  Further, when the recording unit 4 records a television broadcast signal designated by the user, it is possible not to record only the advertisement signal. In this case, when the television broadcast signal designated by the user includes the advertisement signal recorded in the advertisement signal DB 9, the television broadcast signal is recorded on the recording medium 5 while deleting the advertisement signal. When the television broadcast signal designated by the user does not include the advertisement signal recorded in the advertisement signal DB 9, all the television broadcast signals are recorded on the recording medium 5.

The figure which shows schematic structure of the recording / reproducing apparatus for describing 1st embodiment of this invention The figure which shows schematic structure of the advertisement signal detection part of the recording / reproducing apparatus for describing 1st embodiment of this invention The figure which shows the operation | movement flow at the time of CM deletion mode of the recording / reproducing apparatus for describing 1st embodiment of this invention The figure which shows schematic structure of the recording / reproducing apparatus for describing 2nd embodiment of this invention The figure which shows the operation | movement flow at the time of advertisement signal DB creation mode of the recording / reproducing apparatus for describing 2nd embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Recording / reproducing apparatus 1 Reception part 2 Control part 3 Operation part 4 Recording part 5 Recording medium 6 Advertisement signal detection part 7 Reproduction part 8 Output part

Claims (5)

An advertisement signal detection device for detecting an advertisement signal included in a television broadcast signal recorded on a recording medium,
Determining means for determining whether or not the same signal is present in the television broadcast signal;
An advertisement signal detection apparatus comprising: advertisement signal recognition means for recognizing the same signal as the advertisement signal when the determination means determines that the same signal is present. A recording / reproducing apparatus for recording a designated television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium,
An advertisement signal detection device according to claim 1;
A recording / reproducing apparatus comprising: an advertisement signal deleting unit that deletes an advertisement signal detected by the advertisement signal detection apparatus from the designated television broadcast signal from the recording medium. A recording / reproducing apparatus for recording a designated television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium,
An advertisement signal detection device according to claim 1;
Recording means for recording the television broadcast signal on the recording medium;
Replaying means for replaying a television broadcast signal recorded on the recording medium,
The recording / reproducing apparatus for reproducing the television broadcast signal recorded on the recording medium while skipping the advertisement signal detected by the advertisement signal detection apparatus from the television broadcast signal. A recording / reproducing apparatus for recording a television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium,
An advertisement signal detection device according to claim 1;
Recording means for recording the television broadcast signal and the designated television broadcast signal for a predetermined period on the recording medium;
An advertisement signal database that records the advertisement signal detected by the advertisement signal detection device from the advertisement signal included in the television broadcast signal for the predetermined period;
When the designated television broadcast signal includes an advertisement signal recorded in the advertisement signal database, the recording means deletes the advertisement signal and deletes the television broadcast signal from the recording medium. Recording / playback device for recording in A recording / reproducing apparatus for recording a television broadcast signal on a recording medium and reproducing the television broadcast signal recorded on the recording medium,
An advertisement signal detection device according to claim 1;
Recording means for recording the television broadcast signal and the designated television broadcast signal for a predetermined period on the recording medium;
An advertisement signal database for recording the advertisement signal detected by the advertisement signal detection device from the television broadcast signal for the predetermined period;
Replaying means for replaying a television broadcast signal recorded on the recording medium,
The reproduction means reproduces the television broadcast signal while skipping the advertisement signal when the television broadcast signal to be reproduced includes the advertisement signal recorded in the advertisement signal database. Playback device.

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