JP5115127B2 - Program recording / reproducing apparatus and program recording / reproducing method - Google Patents

Description

  The present invention automatically selects and records a broadcast program based on user preference information and electronic program information of the broadcast program, and automatically records a recorded program (hereinafter referred to as a recorded program). The present invention relates to a program recording / reproducing apparatus and a program recording / reproducing method to be erased.

  With the spread of digital broadcasting capable of multi-channeling, a very large number of programs are broadcast, and it is complicated for users to search for and record their favorite broadcast programs.

As an improvement measure, users set genre, channel, day of the week, time, etc. according to their preferences as preference information in advance, and automatically record programs that match the user's preference from electronic program information and preference information There is a method called automatic recording. Further, when the recording medium runs out of space, the preference level of the recording reservation candidate and the recorded program is compared, and if there is a recording reservation candidate with a higher preference level or the same as the recording program, the program with a lower preference level and an older date There is a method of recording a recording reservation candidate by erasing (see, for example, Patent Document 1).
JP 2006-80974 A

  In such an automatic recording method, a broadcast program will not be recorded unless a recording reservation candidate having a preference level higher than that of a recorded program appears after the recording medium has run out, so the longer the usage period is, There was a problem that it was difficult to record new broadcast programs.

  Moreover, since it is necessary for the user to set preference information in advance, there is a problem in that the user's effort increases and the potential preference of the user cannot be reflected.

  The present invention has been made in order to solve the above-described problems, and a program recording / playback apparatus capable of automatically recording a new program that meets the user's preference even when the usage period is long, and A program recording / playback method is obtained. Furthermore, a program recording / reproducing apparatus and program recording / reproducing method capable of automatically setting preference information are obtained.

The program recording / playback apparatus according to the present invention includes a recording unit for recording a broadcast program, an electronic program guide data storage unit for storing electronic program guide data including electronic program information related to the broadcast program, and the recording unit. a recorded program storage unit for storing the recorded program information obtained from the electronic program information about the recorded recorded program and the recording program, when the user has reproduced the recorded program in the recorded program storage unit, the program Based on the playback history storage unit that stores the playback history including the playback date and time and the recorded program information stored in the recorded program storage unit and the playback history stored in the playback history storage unit, Based on the preference information storage unit that stores preference information weighted according to the user's preference and the playback history stored in the playback history storage unit, the recording unit The playback ratio obtained by dividing the total playback time of the recorded program by the program time length is obtained and increases as the playback ratio increases, and the difference between the last playback date and the current date of the playback history of the recorded program increases. A recorded program correction coefficient calculation unit that sets a decreasing recorded program correction coefficient, and a preference degree number for the recorded program stored in the recorded program storage unit based on preference information stored in the preference information storage unit When the value obtained by multiplying the degree of preference by the recorded program correction coefficient is less than a preset program storage level, the recorded program to which the degree of preference is assigned is held as an erased program, and the electronic program guide data storage is performed. the release based on the preference information stored in the preference information storage unit and the electronic program information of the broadcast scheduled programs that are listed in the electronic program guide data stored in the section Seeking preferences frequency of scheduled programs, if the preference degree is program storage levels greater than or equal to the preset, the program selection unit for holding a broadcast scheduled program to which the preference degree is assigned as recording reservation program, the program selecting section And an erasure unit for erasing the recorded program information and playback history corresponding to the erased program, and a reservation unit for reserving the recording reservation program held in the program selection unit. It is.

  In addition, a preference information update unit that updates the preference information based on the reproduction history is provided.

According to the present invention, preference information and electronic program guide data storage weighted according to a user's preference based on recorded program information stored in a recorded program storage unit and a reproduction history stored in a reproduction history storage unit The degree of preference is obtained based on the electronic program information of the program in the department, the program in the electronic program guide data in which the degree of preference has reached the program storage level is reserved for recording, and the preference information and the recording in the recorded program storage part are recorded. A preference degree number is obtained based on the program information and the reproduction history in the reproduction history storage unit, and a recorded program whose value obtained by multiplying the preference degree by a recorded program correction coefficient does not reach the program storage level is deleted. As a result, it is possible to reduce the degree of preference of recorded programs that have been recorded in the past but not played at all, and recorded programs that have been played before but have not been played recently, and the preference of newly broadcast programs The frequency can be relatively increased compared to the preference frequency of a recorded program that has not been played much. Therefore, there is an effect that it is easy to record a new broadcast program that meets the user's preference while leaving a recorded program that the user likes that is sometimes played after being recorded in the past.

  In addition, since the user's preference is automatically obtained based on the user's playback history with respect to the recorded program, the user simply selects and plays the program of interest among the recorded programs. Programs that are required are continuously accumulated, and programs that are not of interest are automatically deleted. Therefore, there is an effect that the labor of the user is reduced and the potential preference of the user can be reflected.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of a program recording / playback apparatus according to Embodiment 1 for carrying out the present invention. In FIG. 1, a program recording / reproducing apparatus 15 receives a user operation from a remote controller 17 and outputs reproduced video and audio to a television 16. Each part of the program recording / reproducing apparatus 15 is connected to the bus 14, and the control unit 9 controls the entire program recording / reproducing apparatus 15. The program recording / playback device 15 stores, as storage areas, a recorded program and a recorded program storage unit 3 for storing recorded program information, an electronic program guide data storage unit 4 for storing electronic program guide data, and a user's playback history. There is a reproduction history storage unit 5 that performs the operation, and a preference information storage unit 6 that stores the user's preference information. In addition, the broadcast receiver 1 that operates in response to a command from the control unit 9 extracts a signal of a specific channel from the broadcast wave signal input from the antenna and sends the video / audio stream to the bus 14. The recording unit 2 that records the audio stream in the unit of the program together with the recorded program information to the recorded program storage unit 3, the video / audio stream that has flowed from the broadcast receiving unit 1 to the bus 14 and the program stored in the recorded program storage unit 3 are reproduced. A playback unit 7 to perform, an input unit 8 to receive a signal from the remote controller 17, and a preference information update unit to analyze the user's preference information from the playback history in the playback history storage unit 5 and update the preference information in the preference information storage unit 6 10. A program selection unit 11 for determining whether the program has reached the program storage level from the recorded program information in the electronic program guide data storage unit 4 and the recorded program storage unit 3; Of the programs determined to have reached the program storage level by the unit 11, the reservation unit 12 for reserving a program to be broadcast in the future, and the program determined to have not reached the program storage level by the program selection unit 11 There is an erasure unit 13 for erasing a program stored in the recorded program storage unit 3.

  Next, a procedure for recording a reserved program will be described. Recording of the reserved program is started based on the program reservation information of FIG. 2 managed by the reservation unit 12. In the program reservation information in FIG. 2, a reservation number, a channel, a broadcast start date and time, a program time length, a title, and a genre are described. When the broadcast start date and time described in the program reservation information approaches, the reservation unit 12 issues a program reservation notification to the control unit 9 and then instructs the broadcast reception unit 1 to change the channel. 2 is instructed to start recording the program.

  The recording unit 2 takes out the electronic program information of the program to be recorded from the electronic program data storage unit 4 and stores it in the recorded program storage unit 3 as recorded program information. FIG. 3 shows an example of recorded program information, which is structured to be managed by program number for each program. The fields in each program number include a channel obtained from the electronic program information, broadcast start date and time, day of the week, title, There are an item describing the genre and a stream item indicating in which file the audio / video stream is recorded. The recording unit 2 describes the information of the program to be recorded in the recorded program information, and then uses the file with the file name described in the stream field of the recorded program information as the recorded program in the video / audio stream output from the broadcast receiving unit 1 Recorded in the recorded program storage unit 3 via the bus 14. When the time described in the program time length of the program reservation information has elapsed, the reservation unit 12 instructs the recording unit to stop recording and ends the recording of the program.

  Subsequently, a procedure for reproducing a program will be described. When the user instructs display of the playlist with the remote controller 17, the instruction is transmitted from the input unit 8 to the control unit 9, and the control unit 9 instructs the playback unit 7 to display the playlist.

  The reproduction unit 7 takes out the recorded program information from the recorded program storage unit 3 and displays it on the television 16 as a reproduction list. When the user selects a desired program, the program is transmitted to the playback unit 7 via the remote controller 17, the input unit 8, and the control unit 9. The playback unit 7 reads and plays the stream file of the designated program. When a stream file is played, a playback history is recorded at the same time.

  An example of the playback history stored in the playback history storage unit 5 is shown in FIG. The playback history is configured to store the history in units of program numbers. This program number corresponds to the program number in FIG. The playback history includes fields for recording the playback start date and time and the playback time. In the field of reproduction start date and time, the first date and time when the reproduction of the program is started is recorded as the reproduction start date of the history 1. When the program is reproduced again on another day, it is added as the reproduction start date and time of the history 2. Thereafter, if the playback date is different from the date of the previous playback start date and time, they are sequentially added as a new history. In addition, the total playback time on the same day is recorded in the playback time.

  Next, a specific history adding operation will be described. When a playback instruction for a program is input to the playback unit 7, it is checked whether there is a program number history corresponding to the program to be played back that is the same as the current date. If it does not exist, the history is added and the current time is recorded as the playback start time, and the initial value of the playback time is set to 0, and the integration of the playback time is started. When the reproduction is completed, the accumulation of the reproduction time is stopped, and the integrated value at that time is recorded as the reproduction time. If there is a history for the same day, a new history is not created and the recorded playback time for the same day is acquired and the value is set as the initial value, and integration of the playback time is started from that value. To do. When the user instructs to stop, the playback unit 7 stops the integration of the playback time and records the integrated value at that time as the playback time. By this operation, the sum total of the reproduction time of one day is obtained.

  In addition to normal playback, playback includes fast forward, rewind, slow playback, still playback, etc. Here, for the sake of simplicity, the real time from playback start to stop is added, but fast forward and rewind are not By considering the scene as a less interesting scene and deliberately shortening the playback time, or by slowing or still playing the scene as an interesting scene and deliberately increasing the playback time. It is possible to reflect the taste of. The reproduction history may set an upper limit on the number of registrations in units of program numbers, and the oldest history may be deleted when the upper limit is reached. By doing so, it is possible to prevent the history from being excessively accumulated in a specific program.

  Next, processing for updating the preference information in the preference information storage unit 6 based on the recorded program information and the reproduction history will be described. The user's current preference is that information on six items of channel, time zone, day of the week, program time length, title, and word is extracted from the recorded program information corresponding to each reproduction history unit and counted for each item. For example, for program 2 in FIG. 4, information on program 2 is counted twice for each of the six items. For this reason, information on a recorded program having a larger number of reproduction histories is more preferentially counted.

  Broadcast time zones are classified according to broadcast time zone classifications shown in FIG. In FIG. 5, the broadcast time zone classification is classified by paying attention to the time at which the broadcast of the program is started. Time zone A is a program broadcast in the morning, and time zone B is broadcast in the morning from morning until noon. Time zone C is a program broadcast in the afternoon from noon to early evening, time zone D is a program broadcast in the evening, time zone E is a program broadcast in the evening golden time, time zone F is This program is broadcast at midnight. Here, the broadcast start time is used for classification, but the broadcast start time and the broadcast end time may be classified by the midpoint time. The program time length is classified by the category shown in FIG. For words, the words included in the title are extracted. Simple and mechanical word extraction methods include Kanji, Hiragana, Katakana, Alphabet and other character types, punctuation marks such as “.”, “,”, And characters that represent delimiters such as “・”, “/”, Uses a method of extracting words at the boundary of characters representing various parentheses such as “(”, ““ ”,“ <”, etc. In addition, it recognizes particles and separates them, or extracts words using a dictionary. May be.

  FIG. 7 shows a preference information update procedure. In step S101, for all recorded programs having a reproduction history, the channels are totaled for each reproduction history unit. For channel aggregation, a reproduction ratio obtained by dividing the total reproduction time of a program by the program time length is added to the corresponding channel. Based on this reproduction ratio, the degree of interest of the user can be evaluated as a numerical value.

  For example, the total playback time of program number 1 is 3 hours 11 minutes 29 seconds (11489 seconds) from the playback history of FIG. 4, and the program time length is 1 hour (3600 seconds) from the recorded program information of FIG. Therefore, the reproduction ratio is 3.191. Similarly, the reproduction ratios of program numbers 2, 3, 4, and 5 are 0.824, 0.449, 0.810, and 0.000. Channels corresponding to program numbers 1, 2, 3, 4 and 5 are terrestrial digital 4, terrestrial digital 2, terrestrial digital 2, BS digital 8, and terrestrial digital 2, respectively. Then, terrestrial digital 2 (terrestrial D2) is 1.273, terrestrial digital 4 (terrestrial D4) is 3.191, and BS digital 8 (BS8) is 0.810. In this case, the channel that the user is most interested in is terrestrial digital 4 (terrestrial D4) having a reproduction ratio of 3.191.

  In step S102, the time zone is totaled instead of the channel in step S101. Similarly, the day of the week is calculated in step S103, the program time length is calculated in step S104, and the genre is totaled in step S105. In step S106, words are extracted from the titles of all recorded programs by the method described above. In step S107, aggregation is performed for each word extracted in step S106.

  In step 108, the results of aggregation for the channel, time zone, day of the week, program time length, genre, and word are normalized by obtaining the percentage of the total reproduction ratio for each item. For example, the total playback ratio of the channels is 1.273 + 3.191 + 0.810 = 5.274, so the normalized playback ratio of terrestrial D2 is 1.273 / 5.274 × 100 = 24 (rounded to the nearest decimal place) It is. FIG. 8 shows new preference information obtained from the recorded program information of FIG. 3 and the reproduction history of FIG. In FIG. 8, the feature of the program number 1 with the largest reproduction history appears remarkably.

  In step S109, the preference information is updated by recording the new preference information obtained in step S108 in the preference information storage unit 6. When new preference information is recorded in the preference information storage unit 6, the result obtained by weighting and adding the previous preference information and the new preference information may be recorded in the preference information storage unit 6, whereby the preference information is stored. Changes can be adjusted. Further, in FIG. 7, the channel, the time zone, the day of the week, the program time length, the genre, and the words are tabulated in this order, but this order may be changed.

  Next, an operation of selecting a program that matches the user's preference based on the preference information in the preference information storage unit 6 will be described. The program to be selected is a recorded program stored in the recorded program storage unit 3 and a future broadcast program stored in the electronic program guide data storage unit 4. If these two types of programs are handled equally, the degree of preference of a recorded program that has been selected little by little over a long time is judged to be high, and it becomes difficult to record a new program. Therefore, a recorded program correction coefficient for the recorded program is introduced. The recorded program correction coefficient has a value of 0 to 1, and a recorded program having a small value is judged to have a lower degree of preference.

  The recorded program correction coefficient is set for each recorded program based on the broadcast date and time and the reproduction history of the recorded program. The procedure for setting the recorded program correction coefficient is shown in FIG. In FIG. 9, it is checked whether or not a recorded program exists in step S201. If it exists, the process proceeds to step S202, and if it does not exist, the setting of the recorded program correction coefficient is terminated.

  In step S202, a recorded program in which the difference between the current date and the broadcast date of the recorded program is within a certain period is searched, and the recorded program correction coefficient is set to 1. Recorded program correction coefficients for other recorded programs remain unset. The above-mentioned fixed period is a period of one day or more (here 7 days), and to give the user the opportunity to play the program by suspending a certain period until the program is selected after recording. belongs to.

  In step S203, for a program for which the recorded program correction coefficient is not set, the total playback time of the program is calculated from the playback history of each recorded program, and this is divided by the program time length of the program to determine the playback ratio. For example, a recorded program that has never been recorded since recording has a playback ratio of zero. In history step S204, the maximum reproduction ratio among the reproduction ratios calculated in step S203 is obtained. Here, if the maximum reproduction ratio is 0, the minimum value is reset to 1 to hinder the subsequent processing.

  In step S205, for a program with a recorded program correction coefficient not set and a playback history, the difference between the current date and the date when playback was last started is obtained, and the recorded program has been played back last. The elapsed days (hereinafter referred to as the elapsed days after reproduction) are calculated. In step S206, the minimum number of elapsed days after reproduction among the elapsed days after reproduction calculated in step S205 is obtained. Here, if the minimum number of days elapsed after reproduction is 0 days, the minimum value is reset to 1 day to hinder subsequent processing.

  In step S207 and subsequent steps, whether or not the recorded program correction coefficient is set for all the recorded programs is sequentially checked according to the program number, and the recorded program correction coefficient is set for the recorded program for which the recorded program correction coefficient is not set.

  First, in step S207, it is determined whether or not confirmation of whether or not a recorded program correction coefficient has been set for all recorded programs has been completed. If the confirmation is completed, the setting of the recorded program correction coefficient is terminated, and if not completed, the process proceeds to step S208. In step S208, a recorded program that has not been confirmed is selected, and it is checked whether or not the recorded program correction coefficient is not set. If the recorded program correction coefficient is set, the process proceeds to step S213, and if not set, the process proceeds to step S209. In step S209, a value obtained by dividing the playback ratio of the program by the maximum playback ratio is set as the recorded program correction coefficient.

  In step S210, it is checked whether or not there is a reproduction history. If there is no reproduction history, the process proceeds to step S212, and if there is a reproduction history, the process proceeds to S211. In step S211, the value α is multiplied by the minimum number of elapsed days after reproduction, and the value is divided by the number of elapsed days after reproduction of the program to obtain the degree of elapsed time after reproduction.

  The α is a value of 1 or more, and is 7 here. The purpose of multiplying α by the number of days that have elapsed since the minimum playback is to calculate the value of the number of days that have elapsed since the minimum playback by the number of days that have elapsed since playback. This is because the difference is moderated. Multiplying α by the number of days elapsed after reproduction may cause the degree of progress after reproduction to exceed 1, but if it exceeds 1, the degree of progress after reproduction is regarded as 1. For example, when α is set to 7 as described above, if the number of days elapsed after playback of the program is not more than seven times the number of days elapsed after minimum playback, the degree of progress after playback is regarded as equivalent to the program having the number of days elapsed after playback become. The post-reproduction progress obtained in this way is added to the recorded program correction coefficient set in S209.

  In step S212, the recorded program correction coefficient is divided by two. By performing this process, the recorded program correction coefficient takes a value from 0 to 1. In step S213, the process proceeds to the previous step S207 for the next recorded program.

  FIG. 10 shows the recorded program correction coefficient obtained by the processing of FIG. 9 from the recorded program information of FIG. 3 and the reproduction history of FIG. The current date is calculated as April 24, 2007. In FIG. 10, since program numbers 4 and 5 have fewer days than the fixed period described in FIG. 9 (7 days in this case), the recorded program correction coefficient is fixed to 1, and the following maximum playback ratio and It is not the target recorded program when calculating the number of days elapsed since the minimum playback.

  The maximum playback ratio for the recorded programs 1, 2, and 3 is 3.191 of program number 1, and the minimum number of days elapsed after playback is 1 of program number 3. The reproduction ratio (after normalization) represents “reproduction ratio / maximum reproduction ratio”. Further, the elapsed days (after normalization) is the same as the above-mentioned post-reproduction progress degree, and “minimum post-reproduction elapsed days × α (here 7) / elapsed post-reproduction days” (1 when 1 is exceeded) ). Program number 1 having a large reproduction history has a high reproduction ratio (after normalization) and a relatively large value for the number of days elapsed after reproduction (after normalization). In program days 2 and 3, which show the maximum value of 1.000 in the number of days elapsed after reproduction (after normalization), the reproduction ratio (after normalization) is significantly low due to the influence of program number 1 having a high reproduction ratio. ing. Therefore, when the recorded program correction coefficient finally obtained is compared, the recorded program correction coefficient of the program number 1 that the user frequently reproduces for a long time is larger than the program numbers 2 and 3.

  When the recorded program correction coefficient is determined, the preference information storage unit 6 has a preference for the recorded program stored in the recorded program storage unit 3 and the future broadcast program stored in the electronic program guide data storage unit 4. Based on the information, it becomes possible to select a program that suits the user's preference. The program selection procedure is shown in FIG.

  FIG. 11 includes three processes. The first is the weighting process for each item of the preference information in step S301, the second is the selection and deletion process of the recorded program from step S302 to step S306, and the third is the selection of the broadcast scheduled program from step S307 to step S312 It is a reservation process.

  In step S301, 6 items of preference information are weighted. There is a difference in the degree of preference information reflecting the user's preference depending on the item. The adjustment between these items is performed in the weighting process in step S301. An example of the preference information correction value obtained by weighting the preference information of FIG. 8 is shown in FIG. The weighting of each item is represented by W in the figure. The genre and the word are 5, the channel and the day of the week are 2, the time zone and the program time length are 1. The preference information correction value in FIG. 12 is a value obtained by multiplying the preference information in FIG. 8 by W for each item.

  In step S302, the presence / absence of a recorded program is checked. If there is a recorded program, the process proceeds to step S303; otherwise, the process proceeds to step S307.

  In step S303, the degree of preference of the recorded program is calculated. FIG. 13 explains the number of preference degrees. The preference shown in the figure is obtained as follows. First, a value for each item is calculated for each program from the recorded program information (FIG. 3) of the target recorded program and the preference information correction value of FIG. For example, in FIG. 13, the value of the item of the channel of the time zone of the recorded program 1 is terrestrial digital 4 (terrestrial D4) from FIG. Next, the value of each item is added for the recorded program 1. The addition result is 1091, and this is the preference level of the recorded program 1 before correction. Further, the preference level of the recorded program is multiplied by the recorded program correction coefficient shown in FIG. 10 to correct the preference level and obtain the final preference level. In the case of the recorded program 1, it is 1091 × 0.889 = 970.

  In step S304, the preference degree number is compared with the program storage level. If the preference number is equal to or higher than the program storage level, the recorded program is held as it is, and the process proceeds to step S306. If the preference degree is less than the program storage level, the recorded program, the recorded program information, and the reproduction history that are currently targeted are erased by the erasure unit 13 in step S305. In step S306, the process proceeds to the next recorded program.

  In step S307, the presence or absence of a program scheduled to be broadcast in the electronic program guide data is checked. If there is a broadcast-scheduled program, the process proceeds to step S308; otherwise, the process proceeds to step S312. In step S308, the number of preferences for the broadcast-scheduled program is calculated. Here, the preference degree number calculated based on the electronic program information of the broadcast-scheduled program in the current electronic program guide data and the preference information correction value in FIG. 12 is used. At that time, the number of preferences is not corrected as in the case of a recorded program. In step S309, the preference degree number is compared with the program storage level. If the preference level is equal to or higher than the program storage level, the process proceeds to step S310; otherwise, the process proceeds to step S311. In step S310, the degree of preference is compared between a program that is currently held as a reservation candidate and a program that is already held as a reservation candidate, and added to positions that are arranged in descending order of the degree of preference. In step S311, the process proceeds to the next broadcast-scheduled program. In step S312, the reservation unit 12 makes a reservation candidate program reservation.

  For example, when the program storage level is set to 250, the program number 3 in FIG. 13 is deleted, and other recorded programs are retained. The reserved programs are reserved because reservation numbers 1 and 2 have a preference number of 250 or more.

  When a reservation candidate is reserved for a program by the reservation unit 12, if the program is recorded, the capacity of the recorded program storage unit 3 may be exceeded. In that case, reservations are made as much as possible in order from the top of the reservation candidates. As a method other than this, although the process becomes complicated, the above program selection process may be repeated by temporarily raising the program storage level until the shortage of capacity is resolved. By doing so, the number of programs to be erased increases in the recorded programs stored in the recorded program storage unit 3 and the number of programs scheduled to be recorded among the broadcast scheduled programs decreases, so that the capacity of the recorded program storage unit 3 is avoided. Can do.

  It is desirable that the preference information update procedure, the recorded program correction coefficient calculation procedure, and the program selection procedure are performed in the order described above. As the timing for execution, it is desirable to carry out at a fixed time every day, after the reservation operation is executed, or when the electronic program guide data acquisition is completed. In the initial state, since there is no information in the recorded program storage unit 3 and the reproduction history storage unit 5 necessary for obtaining the user's preference, program reservations of various genres are automatically entered and recorded. For example, initial setting for storing information in the recorded program storage unit 3 and the reproduction history storage unit 5 is necessary.

  In the first embodiment, weighting is performed so that the number of preference levels changes based on a playback ratio obtained by dividing the total playback time of a recorded program by the program time length, and the last playback date and the current playback history of the recorded program are recorded. By weighting so that the preference level decreases as the date difference increases, the user's preference, including potential preferences, can be reflected in the numerical value as the preference level. There is an effect that it is possible to select programs in a centralized manner, and it is possible to automatically record a new program that seems to meet the user's preference while maintaining a recorded program that matches the user's preference. Also, even if the user does not input his / her preference, the user's favorite channel, genre, word, etc. can be automatically determined by analyzing the user's preference in units of playback history. By simply watching the recorded program that you want to watch, programs that you are not interested in are automatically deleted, and the programs you are interested in are stored.

Embodiment 2. FIG.
In the first embodiment, when the user's preference is determined, the playback history of the recorded program is used. However, since there is no playback history for analyzing the user's preference in the initial state, the playback history is accumulated. It cannot be analyzed until it is done. On the other hand, the second embodiment is characterized in that it can be stored as viewing history from viewing information of the user's television.

  FIG. 14 is a block diagram showing the configuration of the second embodiment of the present invention. In the figure, a viewing history storage unit 18 is added to the first embodiment, and the input unit 8 can obtain viewing information from the television 16. Moreover, when the preference information update part 10 updates preference information, the points which can also view the viewing history memory | storage part 18 differ. These will be described below.

  Each time the user changes the channel, the input unit 8 receives the changed channel number being viewed from the television 16 and obtains the electronic program information of the corresponding channel from the electronic program guide data storage unit 4 to obtain the viewing history. Record in the storage unit 18. At this time, in order to exclude viewing information when zapping (operation for frequently switching and watching TV channels) is performed, it is confirmed that the viewing period is maintained for a certain period of time. It is recorded in the viewing history storage unit 18.

  The preference information update unit 10 refers to the reproduction history storage unit 5 and analyzes the user's preference with reference to the viewing history 18 when there is no reproduction history or very little. The procedure is handled as if the recorded programs having only one reproduction history are arranged, so that the preference information updating procedure of FIG. 7 can be diverted similarly to the reproduction history.

  In the second embodiment, even when there is no playback history such as in the initial state, the preference information is obtained based on the program viewed by the user, so the user has started using it. Immediately after that, automatic program recording reflecting the user's preference becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the program recording / reproducing apparatus which shows Embodiment 1 of this invention. It is a block diagram of the program reservation information which shows Embodiment 1 of this invention. It is a block diagram of the recorded program information which shows Embodiment 1 of this invention. It is a block diagram of a reproduction history showing the first embodiment of the present invention. It is explanatory drawing of the broadcast time slot | zone division which shows Embodiment 1 of this invention. It is explanatory drawing of the program time length division which shows Embodiment 1 of this invention. It is a flowchart of the preference information update which shows Embodiment 1 of this invention. It is explanatory drawing of the new preference information which shows Embodiment 1 of this invention. It is a flowchart of the video recording program correction coefficient calculation which shows Embodiment 1 of this invention. It is explanatory drawing of the video recording program correction coefficient which shows Embodiment 1 of this invention. It is a flowchart of the program selection which shows Embodiment 1 of this invention. It is explanatory drawing of the weighting of preference information which shows Embodiment 1 of this invention. It is explanatory drawing of the preference degree number of the program which shows Embodiment 1 of this invention. It is a block diagram of the program recording / reproducing apparatus which shows Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Broadcast receiving part 2 Recording part 3 Recorded program storage part 4 Electronic program guide data storage part 5 Reproduction history storage part 6 Preference information storage part 10 Preference information update part 11 Program selection part 12 Reservation part 13 Erasing part 15 Program recording and reproducing apparatus 18 Viewing history storage

Claims (8)

A recording unit for recording a broadcast program;
An electronic program guide data storage unit for storing electronic program guide data including electronic program information relating to a broadcast program ;
A recorded program storage unit for storing the recorded program information obtained from the electronic program information about the recorded recorded program and the recording program by the recording section,
A reproduction history storage unit that stores a reproduction history including a reproduction date and time and a reproduction time of the program when the user reproduces the program recorded in the recorded program storage unit;
Preference information storage for storing preference information weighted according to user's preference based on the recorded program information stored in the recorded program storage unit and the reproduction history stored in the reproduction history storage unit And
Based on the reproduction history stored in the reproduction history storage unit, a reproduction ratio obtained by dividing the total reproduction time of the recorded program recorded by the recording unit by the program time length is increased as the reproduction ratio increases, And a recorded program correction coefficient calculating unit for setting a recorded program correction coefficient that decreases as the difference between the last reproduction date and the current date of the reproduction history of the recorded program increases,
A preference number is obtained for the recorded program stored in the recorded program storage unit based on preference information stored in the preference information storage unit, and a value obtained by multiplying the preference program number by the recorded program correction coefficient is set in advance. If the recorded program level is lower than the program storage level, the recorded program to which the preference degree is assigned is held as an erased program, and the broadcast described in the electronic program guide data stored in the electronic program guide data storage unit is stored. seeking preferences frequency of the broadcast scheduled programs based on the preference information stored in the preference information storage unit and the electronic program information of scheduled programs, if the preference degree is program storage levels greater than or equal to the preset, the preference A program selection unit for holding a scheduled broadcast program assigned a frequency as a scheduled recording program;
An erasure unit for erasing the erased program held in the program selection unit, recorded program information and playback history corresponding to the erased program, and
A program recording / playback apparatus, comprising: a reservation unit configured to reserve recording of the recording reservation program held in the program selection unit. The recorded program information includes, for each program, an item describing a channel, broadcast start date and time, day of the week, program time length, title and genre, and a stream item indicating in which file the audio / video stream is recorded. 2. The program recording / reproducing apparatus according to claim 1, wherein Comprising a preference information updating unit for updating the 嗜 good information,
The program recording / playback apparatus according to claim 1 or 2, wherein the preference information update unit updates preference information based on a playback history . A preference information update unit for updating preference information;
And a viewing information storing unit for storing the audience information inputted from the outside,
The program recording / reproducing apparatus according to claim 1 or 2 , wherein the preference information update unit updates preference information based on reproduction history or viewing information . Recording a broadcast program;
Storing electronic program guide data including electronic program information relating to programs to be broadcast;
A step of storing the recorded program information obtained from the electronic program information about the recorded recorded program and the recording program,
Storing a reproduction history including a reproduction date and time and a reproduction time of the program when the user reproduces the recorded program;
Storing preference information weighted according to user preferences based on the recorded program information and the playback history;
Based on the playback history, a playback ratio obtained by dividing the total playback time of the recorded recorded program by the program time length is obtained, and increases as the playback ratio increases, and the last playback date of the playback history of the recorded program and Setting a recorded program correction factor that decreases as the difference in the current day increases;
If the value obtained by multiplying the preference degree by the recorded program correction coefficient is less than a preset program storage level, the preference degree is assigned to the recorded program based on the preference information. The recorded program is held as an erased program, and the degree of preference of the broadcast-scheduled program is obtained based on the electronic program information of the broadcast-scheduled program described in the electronic program guide data and the preference information. If the program storage level is higher than the set program storage level, holding the broadcast-scheduled program to which the preference number is assigned as a scheduled recording program;
Erasing the erased program, recorded program information and playback history corresponding to the erased program;
And a program recording / reproducing method comprising: recording reservation of the recording reservation program. The recorded program information includes, for each program, an item describing a channel, broadcast start date and time, day of the week, program time length, title and genre, and a stream item indicating in which file the audio / video stream is recorded. 6. The program recording / reproducing method according to claim 5 , wherein the program is recorded and reproduced. Comprising updating 嗜 good information,
The program recording / playback method according to claim 5 or 6 , wherein the step of updating the preference information updates the preference information based on a playback history . Updating the preference information;
And a step of storing viewing information inputted from the outside,
The program recording / reproducing method according to claim 5 or 6 , wherein the step of updating the preference information updates the preference information based on reproduction history or viewing information .

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