JP2010283621A - Broadcast receiving and recording apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast receiving and recording apparatus and program for reproducing broadcast data to be divided during recording as consistent broadcast content when reproducing a plurality of pieces of broadcast data simultaneously broadcasted, which are recorded using the reception quality of received broadcast signals while switching two broadcast signals. <P>SOLUTION: Main broadcasting such as terrestrial digital high-definition broadcasting, or sub-broadcasting such as one-segment broadcasting is recorded in accordance with the reception quality thereof. The recorded divided broadcast data comprising main broadcast data and sub-broadcast data are converted such that they have the same encoding methods and resolutions, to combine them as consistent broadcast data. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a broadcast receiving / recording apparatus and program capable of receiving and recording broadcast signals.

  A receiving device that receives terrestrial digital broadcasting includes a tuner that demodulates a received signal into a transport stream (TS), and after separating various packets from the TS, the decoder decodes the data stream generated from the packets, Generate video and audio. In terrestrial digital broadcasting, a frequency band assigned to one broadcasting station is divided into 13 segments, and one segment is extracted from the base station using one of these segments. In addition, high-definition broadcasting is transmitted using the remaining 12 segments.

  Of these, one-segment broadcasting is broadcast standardized for portable receivers, and is powerful so that broadcast data can be decoded almost correctly if the CN ratio (Carrier to Noise Ratio) of received radio waves is about 7 dB or more. An error correction function is adopted. On the other hand, since the high-definition broadcast is a broadcast standardized for a fixed receiver, the minimum CN ratio required for correct decoding is about 20 dB. Therefore, when receiving a high-definition broadcast using an antenna with low reception sensitivity, a necessary CN ratio may not be ensured in an area where the electric field strength is weak. At this time, if the program is displayed by switching to the one-segment broadcasting that broadcasts the same program, the user can continue to view the same program without trouble, which is convenient. The same applies to the case where the program is automatically switched from the one-segment broadcasting to the full-segment broadcasting when moving from an area where the electric field strength is weak to a strong area.

  Patent Document 1 describes whether two digital broadcasts of a high bit rate and a low bit rate are simulcast using character information about a program included in EPG (electronic program guide) data, start / end time, and the like. A technique for determining and switching the output of a broadcast signal is disclosed. This switching function is premised on the fact that one-segment broadcasting and high-definition broadcasting are simultaneous broadcasting, that is, a digital broadcasting station transmits the same program. Because if two broadcasts are not simulcast and the user straddles the boundary of the field strength field while watching or recording the broadcast, the program will be switched to a program different from the program being viewed. Because.

  Patent Document 2 also describes the correspondence relationship between channels of analog broadcasts that transmit the same program as digital broadcasts included in digital broadcast waves in the process of determining whether digital broadcasts and analog broadcasts are simultaneous broadcasts. A method based on a channel map to be expressed, and a method for detecting and determining the degree of correlation between both video and audio signals are disclosed.

  Patent Document 3 discloses a method for performing simultaneous discrimination using both digital broadcast and analog broadcast electronic program guides.

Patent Document 4 describes that, as a problem of Patent Documents 2 and 3, when recording is performed by switching between digital broadcasting and analog broadcasting, broadcast data is divided and recorded. Furthermore, as a cause of the division of the broadcast data, playback stops at the timing of switching between the digital broadcast and the analog broadcast, and in order to watch the continuation, the continuation data is searched from the recorded broadcast data. It touches on the need for operation.
Therefore, in order to eliminate this operation, when switching from the main digital broadcast to the secondary analog broadcast or vice versa, a plurality of video data streams generated in the broadcast data recording process are recorded. A method is disclosed for combining into one video data stream after completion. There is also a description of a method of recording continuously in the same video data stream when switching occurs, not after the end of recording.

  However, in the broadcast data combining method described in Patent Document 4 described above, the video size and encoding method in the main digital broadcast and the subordinate analog broadcast are not considered. Therefore, if the resolution of the main broadcast and the sub broadcast is different, if the divided recording files are simply combined, the resolution of the video displayed when playing the combined recording file will change, making it very difficult to see . Further, when the main broadcast and the sub-broadcast encoding methods are different, when the divided recording files are simply combined, if one combined recording file is reproduced, Codec (Coder / Decoder: code) is used. It is conceivable that the reproduction process of the recorded file becomes complicated because the resolution of the video / decoding algorithm) and the video are different.

JP 2007-49410 A JP 2001-128078 A JP 2001-309272 A JP 2005-354570 A

  The present invention has been made in view of such a problem, and in a broadcast receiving and recording apparatus for recording by switching between two broadcast signals using reception quality of a received broadcast signal, a plurality of recorded simultaneous broadcasts are recorded. An object of the present invention is to provide a broadcast receiving and recording apparatus and program for reproducing broadcast data divided at the time of recording as consistent broadcast contents when reproducing broadcast data.

In order to achieve the above object, a broadcast reception recording apparatus according to the first aspect of the present invention provides:
First broadcast receiving means for receiving a first broadcast signal;
Second broadcast receiving means for receiving a second broadcast signal;
Reception quality acquisition means for acquiring reception quality of the first broadcast signal received by the first broadcast reception means and the second broadcast signal received by the second broadcast reception means;
Simultaneous broadcast discriminating means for discriminating whether or not the broadcast by the first broadcast signal and the broadcast by the second broadcast signal are substantially the same;
When it is determined that the simulcast broadcast is substantially the same, the first broadcast signal acquired by the reception quality acquisition unit and the first broadcast signal acquired based on the reception quality of the second broadcast signal. Selecting means for selecting at least one of the first broadcast signal received by the broadcast receiving means and the second broadcast signal received by the second broadcast receiving means;
Conversion means for converting the first broadcast signal and the second broadcast signal selected by the selection means into a common encoding method;
Coupling means for coupling the first broadcast signal and the second broadcast signal converted by the conversion means so as to be continuously reproducible broadcast data;
Storage means for storing broadcast data combined by the combining means;
It is characterized by providing.

  The conversion means converts the first broadcast signal and the second broadcast signal selected by the selection means into an encoding method of either the first broadcast signal or the second broadcast signal. It may be converted.

  The conversion unit may convert the first broadcast signal and the second broadcast signal selected by the selection unit into a common resolution.

  The converting means may be configured such that the first broadcast signal and the second broadcast signal selected by the selecting means are between the resolution of the first broadcast signal and the resolution of the second broadcast signal. You may convert to the resolution of.

Broadcast signal storage means for storing the first broadcast signal and the second broadcast signal selected by the selection means;
The conversion unit may convert the first broadcast signal and the second broadcast signal stored in the broadcast signal storage unit into a common encoding method.

  The selection means selects the first broadcast signal when it is determined that the reception quality of the first broadcast signal acquired by the reception quality acquisition means exceeds a predetermined value, and determines that it does not exceed In some cases, the second broadcast signal may be selected.

The first broadcast signal is a digital high-definition broadcast signal,
The second broadcast signal may be a one-segment broadcast signal.

In order to achieve the above object, a program according to the second aspect of the present invention provides:
Computer
First broadcast receiving means for receiving a first broadcast signal;
Second broadcast receiving means for receiving a second broadcast signal;
Reception quality acquisition means for acquiring reception quality of the first broadcast signal received by the first broadcast reception means and the second broadcast signal received by the second broadcast reception means;
Simultaneous broadcast discriminating means for discriminating whether or not the broadcast by the first broadcast signal and the broadcast by the second broadcast signal are substantially the same;
When it is determined that the simulcast broadcast is substantially the same, the first broadcast signal acquired by the reception quality acquisition unit and the first broadcast signal acquired based on the reception quality of the second broadcast signal. Selecting means for selecting at least one of the first broadcast signal received by the broadcast receiving means and the second broadcast signal received by the second broadcast receiving means;
Conversion means for converting the first broadcast signal and the second broadcast signal selected by the selection means into a common encoding method;
Coupling means for coupling the first broadcast signal and the second broadcast signal converted by the conversion means so as to be continuously reproducible broadcast data;
Storage means for storing broadcast data combined by the combining means;
It is made to function as.

  According to the present invention, when a plurality of broadcast data in a recorded simulcast is reproduced in a broadcast reception recording apparatus that switches and records two broadcast signals using the reception quality of a received broadcast signal, It is possible to provide a broadcast receiving / recording apparatus and program for reproducing divided broadcast data as a consistent broadcast content.

It is a block diagram which shows the function implement | achieved by the control part shown in FIG. It is a block diagram which shows the structure of the broadcast reception recording apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the area which can receive the electromagnetic wave of a main broadcast and a subbroadcast. It is a flowchart of the switching recording process at the time of recording the main broadcast which concerns on Embodiment 1 of this invention. It is a figure which shows the time transition of the reception quality which concerns on Embodiment 1 of this invention, and the broadcast data recorded. It is a figure which shows the broadcast data after the combination in the recording state of the broadcast data which concerns on Embodiment 1 of this invention, and a simulcast. It is a flowchart of the switching video recording process at the time of recording the main broadcast which concerns on Embodiment 2 of this invention.

(Embodiment 1)
Hereinafter, Embodiment 1 according to the present invention will be described with reference to FIGS. 1 to 6.

  First, FIG. 2 is an example of a configuration when the broadcast receiving and recording apparatus according to Embodiment 1 of the present invention is applied to the mobile phone terminal 1. However, the application destination is not limited to the mobile phone terminal, and may be a portable terminal such as a portable television or a notebook computer.

  In addition, the mobile phone terminal 1 according to the present embodiment receives the main broadcast and the sub broadcast and switches and records them. Here, in the present embodiment, the main broadcast refers to, for example, a high-quality terrestrial digital high-definition broadcast, and the sub-broadcast refers to one-segment terrestrial digital broadcast (so-called one-segment broadcast) having a lower quality than the main broadcast. . As shown in FIG. 3, when the main broadcast and the sub broadcast are transmitted from the base station 21, in the area 22 where the electric field strength is strong, both broadcasts can be received with good reception quality, whereas the electric field strength is high. In the weak area 23, only the sub broadcast can be received with a good reception quality. In the area 23 where the electric field strength is weak, the sub broadcast is used as an alternative to the main broadcast.

  As shown in FIG. 2, the mobile phone terminal 1 according to the embodiment of the present invention includes a control 110, a storage unit 120, a main broadcast receiving unit 130, a sub broadcast receiving unit 140, a communication unit 150, an operation unit 160, and a display unit 170. The audio output unit 180 is provided.

  The control unit 110 is configured by a microprocessor or the like, and controls the overall operation of the mobile phone terminal 1 according to an operation program stored in a storage unit 120 described later. For example, the broadcast video received by the main broadcast receiving unit 130 or the sub broadcast receiving unit 140 is displayed on the display unit 170 and the audio is output to the audio output unit 180. In addition, the control unit 110 controls a method for recording received broadcast data.

  The control unit 110 executes the operation program stored in the storage unit 120, thereby realizing the functions shown in FIG. As shown in FIG. 1, the control unit 110 functions as a reception quality measurement unit 111, a simulcast determination unit 112, a recording control unit 113, a broadcast data conversion unit 114, a broadcast data combination unit 115, a time measurement unit 116, and the like.

  The reception quality measuring unit 111 measures the reception quality of the broadcast received by the main broadcast receiving unit 130 and the sub broadcast receiving unit 140 and sends the measurement result to the recording control unit 113. Here, the reception quality is represented by a CN ratio (Carrier to Noise Rate), a BER (Bit Error Rate), a PER (Packet Error Rate), or the like, which is a ratio of carrier wave to noise, but is limited to these representation methods. is not. When the main broadcast receiving unit 130 and the sub broadcast receiving unit 140 are configured separately, for example, the CN ratio of the main broadcast from the main broadcast receiving unit 130 and the CN ratio of the sub broadcast from the sub broadcast receiving unit 140 are set. As such, the reception quality for each broadcast may be acquired.

  The simultaneous broadcast discriminating unit 112 discriminates whether or not the broadcasts received by the main broadcast receiving unit 130 and the sub broadcast receiving unit 140 are the same, and sends the discrimination result to the recording control unit 113. As a determination method, the similarity between the main broadcast and the sub broadcast program information acquired from an external EPG (electronic program guide) site via the Internet by the communication unit 150 is calculated, and the calculated similarity is determined based on a predetermined value. If it is too large, there is a method that assumes simultaneous broadcasting. In addition, there is a method of calculating the degree of correlation between the broadcast signal received by the main broadcast receiving unit 130 and the broadcast signal received by the sub broadcast receiving unit 140 at a certain point in time, but is not particularly limited.

  The recording control unit 113 selects a broadcast to be received / recorded based on the measurement result of the reception quality measurement unit 111, the determination result of the simulcast determination unit 112, and the operation signal from the operation unit 160, and broadcast data is stored in the storage unit 120. Record. If necessary, the broadcast data conversion unit 114 is instructed to perform code conversion of the broadcast data, and the broadcast data combination unit 115 is instructed to combine the broadcast data. For example, when the recorded broadcast data is unified with the sub-broadcast data encoding method and resolution, the sub-broadcast data is not converted, and the broadcast data conversion unit is instructed to convert only the main broadcast data. Further, for example, when the user desires to record the main broadcast, the main broadcast and the sub broadcast are not switched, and when only the main broadcast data is recorded in the storage unit 120, there is no need for conversion and combination. The recording control unit 113 does not instruct the broadcast data conversion unit 114 and the broadcast data combination unit 115.

  The broadcast data converter 114 broadcast data so that the encoding method and resolution of the plurality of broadcast data divided and recorded in the storage unit 120 by switching between the main broadcast and the sub broadcast are the same. Convert. The broadcast data conversion unit 114 may be configured by either software or hardware. The “resolution” used here indicates the total number of pixels used for display. For example, it is 1440 × 1080 for terrestrial digital high-definition broadcasting and 320 × 240 (maximum) for one-segment broadcasting. In addition, the broadcast data conversion unit 114 uses the demodulation and decoding functions of the demodulated signals that the main broadcast receiving unit 130 and the sub broadcast receiving unit 140 have as necessary. The broadcast data conversion unit 114 may encode the demodulated signal. This encoding process may be either a transcoding process for converting the encoding method without performing the decoding process, or an encoding process for performing new encoding after performing the decoding process.

  The broadcast data combining unit 115 combines a plurality of segmented broadcast data having the same encoding method / resolution by the broadcast data converting unit 114 as broadcast data that can be reproduced as a consistent broadcast content, and stores the data. Recorded in section 120.

  The timer 116 measures the current time. The recording control unit 113 acquires the recording start time and end time of the broadcast data from the time measuring unit 116 and stores them in the storage unit 120. Furthermore, when a recording reservation is made by the user, the recording control unit 113 performs recording when the time acquired from the time measuring unit 116 matches the recording start time stored in the storage unit 120. Start.

  Returning to FIG. 2, the storage unit 120 includes, for example, a memory built in the mobile phone, a removable external memory, and the like, and stores, for example, an operation control program of the control unit 110, received broadcast data, and the like. .

  The main broadcast receiving unit 130 includes a circuit that demodulates and decodes the broadcast wave of the main broadcast received via the antenna 131 and the like, and a channel selection circuit (tuner) for selecting a viewing channel.

  The sub broadcast receiving unit 140 includes a circuit that demodulates and decodes the broadcast wave of the sub broadcast received via the antenna 141 and the like, and a channel selection circuit (tuner) for selecting a channel to be viewed. As a tuner of the sub broadcast receiving unit 140, a one seg tuner that can receive only one seg may be used, but only a sub broadcast that is a one seg broadcast may be extracted using a full seg tuner.

  Voice communications, various data, etc. are transmitted / received via a wireless communication base station. For example, the communication unit 150 acquires program information and the like from an external EPG site.

  The operation unit 160 includes a keyboard, buttons, a changeover switch, and the like, and inputs an operation signal to the control unit 110 in accordance with a user operation.

  The display unit 170 includes a display panel such as a liquid crystal or an organic EL, a driver circuit, and the like, and displays an image of broadcast data under the control of the control unit 110.

  The audio output unit 180 is configured by a DAC (Digital to Analog Converter), a speaker, an earphone, or the like. The audio output unit 180 DA-converts the broadcast data being received or the audio signal of the recorded broadcast data, and outputs from the speaker.

  The mobile phone terminal 1 according to the present embodiment configured as described above can receive and record the main broadcast and the sub broadcast in a good state in the area 22 where the electric field strength is strong as shown in FIG. Further, in the area 23 where the electric field strength is weak, the sub broadcast can be received and recorded in a good state. Therefore, in the following, when the user who moves between the area 22 with high electric field intensity and the area 23 with low electric field intensity records the main broadcast using the mobile phone terminal 1 according to the present embodiment, An overview of the switching recording process will be described. FIG. 4 is a flowchart of the switching recording process when the program that the user wants to record is the main broadcast. This switching recording process starts when an operation signal indicating the start of recording of the main broadcast is received from the operation unit 160 by a user operation or when the scheduled recording start time comes.

  First, the recording control unit 113 accesses the storage unit 120 and starts recording the broadcast data received and demodulated / decoded by the main broadcast receiving unit 130 (step S101). Further, the recording control unit 113 accesses the storage unit 120, records the current time acquired from the time measuring unit 116 as the recording start time of the main broadcast, and sets 1 to the recording flag.

  Next, the recording control unit 113 determines whether or not the recording flag is 1, that is, whether or not the currently recorded broadcast data is main broadcast data (step S102).

When it is determined that the recording flag is 1 (step S102; Yes), the recording control unit 113 determines whether the main broadcast can be received based on the measurement result of the reception quality of the main broadcast from the reception quality measurement unit 111. Is determined (step S103). In this embodiment, “main broadcast is receivable” means that the main broadcast can be received with good reception quality. Specifically, for example, the main broadcast received from the reception quality measuring unit 111 is used. The recording control unit 113 determines that “the main broadcast is receivable” when the reception quality of the broadcast is equal to or lower than the predetermined reference value, and “the main broadcast is receivable” when the broadcast reception quality is less than the predetermined reference value. It is determined that it is not.
If it is determined that the main broadcast can be received (step S103; Yes), the recording control unit 113 returns to step S102 and continues recording the main broadcast.

When it is determined that the main broadcast cannot be received (step S103; No), the recording control unit 113 determines whether or not the sub broadcast can be received based on the measurement result of the reception quality of the sub broadcast from the reception quality measurement unit 111. Is determined (step S104). In the present embodiment, “sub-broadcast is receivable” means that the sub-broadcast can be received with good reception quality. Specifically, for example, the sub-broadcast received from the reception quality measuring unit 111 is used. When the reception quality of the broadcast is not more than a predetermined reference value, the recording control unit 113 determines that “sub broadcast is receivable”, and when it is less than the predetermined reference value, “sub broadcast is receivable”. It is determined that it is not.
If it is determined that the sub broadcast cannot be received (step S104; No), since neither the main broadcast nor the sub broadcast can be received, the recording control unit 113 returns to step S102 until the reception is possible. repeat.

  When it is determined that the sub broadcast can be received (step S104; Yes), the simulcast determination unit 112 determines whether the main broadcast and the sub broadcast are simulcast (step S105). If it is determined that the main broadcast and the sub broadcast are not simultaneous broadcasts (step S105; No), the process returns to step S102 and the above-described processing is repeated.

  When it is determined that the main broadcast and the sub broadcast are simultaneous broadcasts (step S105; Yes), the recording control unit 113 switches the output source of the broadcast data to be recorded (step S106). For example, when the main broadcast broadcast data from the main broadcast receiving unit 130 is currently recorded, the recording control unit 113 stops recording the main broadcast broadcast data, and the sub broadcast broadcast data from the sub broadcast receiving unit 140. Start recording. When the sub broadcast data from the sub broadcast receiving unit 140 is currently recorded, the recording control unit 113 stops the recording of the sub broadcast data and the main broadcast data from the main broadcast receiving unit 130. Start recording. When the recording of the sub-broadcast data is started, the recording control unit 113 accesses the storage unit 120 and uses the current time acquired from the time measuring unit 116 as the recording stop time of the main broadcast and the recording start time of the sub-broadcast. And a recording flag is set to 0. When the recording of the main broadcast data is started, the storage unit 120 is accessed to record the current time acquired from the time measuring unit 116 as the sub broadcast recording stop time and the main broadcast recording start time. Set the flag to 1.

  When it is determined in step S102 that the recording flag is not 1 (step S102; No), that is, when the sub broadcast is being recorded, the recording control unit 113 measures the reception quality of the main broadcast from the reception quality measurement unit 111. Based on the result, it is determined whether or not the main broadcast can be received (step S107). When it is determined that the main broadcast cannot be received (step S107; No), the recording control unit 113 returns to step S102 and repeats the above-described processing until it can be received.

  On the other hand, when it is determined that the main broadcast can be received (step S107; Yes), the process proceeds to step S105, and the simultaneous broadcast determination unit 112 determines whether the main broadcast and the sub broadcast are simultaneous broadcasts.

  Until the recording end requirement is satisfied such that the recording control unit 113 receives the operation signal indicating the recording stop of the main broadcast from the operation unit 160 by the user operation, or the scheduled recording end time has come. repeat. If neither the main broadcast nor the sub broadcast can be received, the recording control unit 113 may stop the recording until reception becomes possible, instead of continuing the recording as it is.

  If the recording end requirement is satisfied, the recording control unit 113 stops recording the broadcast data in the storage unit 120 (step S108).

  Then, the broadcast data conversion unit 114 converts the broadcast data so that the encoding method and resolution of the broadcast data of the main broadcast and the broadcast data of the sub broadcast recorded in the storage unit 120 are the same as necessary. (Step S109). Specifically, when a plurality of broadcast data composed of main broadcast data and sub broadcast data stored in the storage unit 120 when a predetermined program is recorded is unified with the encoding method and resolution of the sub broadcast data. Does not convert the sub broadcast data, but converts the encoding method and resolution of the main broadcast to those of the sub broadcast.

  Then, the broadcast data combining unit 115 combines a plurality of broadcast data having the same encoding method and resolution by the broadcast data converting unit 114 as broadcast data that can be reproduced as a consistent broadcast content, and stores it in the storage unit 120. Record (step S110). Then, the switching recording process ends.

  Next, FIG. 5 shows an example of time transition of processing until the recording end requirement is satisfied in the switching recording processing. The graph in the upper part of FIG. 5 is an example showing the time transition of the CN ratio of the received main broadcast and sub broadcast. The threshold value C0 indicates a numerical value of the CN ratio at which the sub broadcast can be received, demodulated, and decoded without any problem. On the other hand, the threshold C1 indicates a numerical value of the CN ratio at which the main broadcast can be received, demodulated, and decoded without problems. The diagram at the bottom of FIG. 5 shows the broadcast data that the mobile terminal device 1 switches and records based on the value of the CN ratio representing the reception quality in a rectangle. The broadcast data 32a of the main broadcast in FIG. 5 is expressed so that the height of the rectangle is larger than that of the broadcast data 31a of the sub broadcast, so that the height of the resolution is schematically expressed by the difference in the height of the rectangle. Yes.

  The relationship between the upper graph and the lower graph in FIG. 5 will be described along the time axis. Here, for easy understanding, switching between the main broadcast and the sub-broadcast is performed by a simple algorithm using the CN ratio value of the main broadcast and the sub-broadcast and the threshold values C0 and C1, but the switching algorithm of the broadcast type The specific algorithm is not particularly limited as long as the recording switching of the broadcast data of the main broadcast and the sub broadcast is performed. For example, the size relationship between the CN ratio of the broadcast signal in a state where the main broadcast signal and the sub broadcast signal are combined and the predetermined CN ratio at which the main broadcast can be received, demodulated and decoded without any problem, or the sub broadcast is received without any problem, Whether or not the main broadcast or the sub broadcast can be received may be determined based on a magnitude relationship with a predetermined CN ratio that can be demodulated and decoded, and switching may be performed based on the result. Here, if neither the main broadcast nor the sub broadcast can be received, the recording is stopped until reception becomes possible, and the recording of the sub broadcast data is stopped while the main broadcast data is being recorded. It shall be.

  First, it is assumed that the switching recording process is started by a user operation or the like at time 0 which is the origin of the graph. From time 0 to time t1, the CN ratio of the main broadcast does not exceed the threshold C1, and the CN ratio of the sub broadcast does not exceed the threshold C0. That is, since neither the main broadcast nor the sub broadcast can be received, the mobile terminal device 1 is in a state where recording is stopped (broadcast data of neither the main broadcast nor the sub broadcast is recorded).

  Subsequently, from time t1 to time t2, the value of the sub broadcast CN ratio exceeds the threshold value C0. However, since the CN ratio of the main broadcast does not exceed the threshold value C1, the sub broadcast can be received. Broadcast cannot be received. Accordingly, the mobile terminal device 1 starts recording the broadcast data of the sub broadcast at time t1, and records the broadcast data 31a.

  Subsequently, since the CN ratio value of the main broadcast exceeds the threshold C1 from time t2 to time t3, the main broadcast is receivable. Therefore, the mobile terminal device 1 stops recording the sub broadcast data at time t2, starts recording the main broadcast data, and records the broadcast data 32a.

  Subsequently, from time t3 to time t4, the value of the sub broadcast CN ratio exceeds the threshold value C0. However, since the CN ratio of the main broadcast does not exceed the threshold value C1, the sub broadcast can be received. Broadcast cannot be received. Therefore, the portable terminal device 1 stops recording the broadcast data of the main broadcast at time t3, starts recording the broadcast data of the sub broadcast, and records the broadcast data 31b.

  Subsequently, from time t4 to time t5, the CN ratio of the main broadcast does not exceed the threshold value C1, and the CN ratio of the sub broadcast does not exceed the threshold value C0. That is, since neither the main broadcast nor the sub broadcast can be received, the mobile terminal device 1 stops recording the broadcast data of the sub broadcast at time t4. Therefore, from the time t4 to the time t5, neither main broadcast data nor sub broadcast data is recorded.

  Subsequently, from time t5 to time t6, the sub broadcast CN ratio value exceeds the threshold value C0, but the main broadcast CN ratio value does not exceed the threshold value C1, so that the sub broadcast can be received. The main broadcast cannot be received. Accordingly, the mobile terminal device 1 starts recording the broadcast data of the sub broadcast at time t5 and records the broadcast data 31c.

  Subsequently, after time t6, the value of the CN ratio of the main broadcast exceeds the threshold value C1, so that the main broadcast can be received. Accordingly, the mobile terminal device 1 stops recording the broadcast data of the sub broadcast at time t6, starts recording the broadcast data of the main broadcast, and records the broadcast data 32b.

  When recording is performed while switching between the main broadcast and the sub broadcast in this way, segmented broadcast data such as main broadcast data 32a and 32b and sub broadcast data 31a, 31b, and 31c is recorded. Therefore, a method of combining broadcast data that has been divided so as to be reproduced as consistent broadcast data will be described.

  First, paying attention to the time t2, problems in recording while switching between the main broadcast and the sub broadcast will be described. Immediately before time t2, broadcast data 31a of the sub broadcast is recorded, and switching to record the broadcast data 32a of the main broadcast at time t2. At this time, the sub broadcast has a low resolution as shown in the broadcast video example 33a, and the main broadcast has a high resolution as shown in the broadcast video example 33b, and the resolutions are different. Therefore, when the broadcast video example 33a and the broadcast video example 33b are simply combined, the resolution suddenly increases at the time t2 during reproduction. This resolution shift is not limited to the time t2, but is also the same for the time t3 when the main broadcast is switched to the sub broadcast and the time t6 when the sub broadcast is switched to the main broadcast. If such a resolution transition is frequently executed, it becomes difficult for the user to view the video.

  Therefore, in order to prevent the resolution from changing when the user views the recorded content, the broadcast data of the main broadcast and the broadcast data of the sub broadcast are combined as shown in FIG.

FIG. 6 is a diagram illustrating a combination method of the main broadcast and the sub broadcast when the determination result of the simultaneous broadcast determination unit 112 is the simultaneous broadcast.
FIG. 6A shows a state where broadcast data is divided when recording is performed by switching between the main broadcast and the sub broadcast, and is the same as the lower part of FIG.
FIG. 6B shows the state of the broadcast data when the main broadcast data and the sub broadcast data are simply combined. As described above, since the resolutions of the broadcast data of the main broadcast and the broadcast data of the sub broadcast are different, the resolution shifts during display at times t2, t3, and t6. In addition, since the broadcast data of the main broadcast and the broadcast data of the sub broadcast are not recorded from time t4 to time t5, this section may be omitted at the time of combination. Further, interpolation may be performed on a black screen or the like.
FIG. 6C shows the recording data when the main broadcast data resolution is unified to the sub broadcast resolution and the main broadcast data and the sub broadcast data are combined based on the recording start time and the recording stop time. It represents the state. In FIG. 6C, for example, the case where the resolution of the sub broadcast is unified is shown. However, the present invention is not limited to this, and the resolution of the main broadcast is unified or the value between the resolution of the main broadcast and the sub broadcast is unified. Or can be unified to any value. Further, the user may be allowed to select a resolution to be unified using the operation unit 160. Thereby, the resolution does not shift during the display of the broadcast data. The combining method from time t4 to time t5 is the same as the method described with reference to FIG.

  Further, when the encoding methods of the broadcast data of the main broadcast and the broadcast data of the sub broadcast are different, they may be converted into a certain unified encoding method. The encoding method employed is not limited to the encoding method of the broadcast data of the main broadcast and the encoding method of the broadcast data of the sub-broadcast, and may be unified to other encoding methods. Further, the user may be allowed to select an encoding method desired to be unified by using the operation unit 160.

  In this way, when the main broadcast cannot be received, it is determined whether or not the broadcast is a simulcast, and if it is a simulcast, the sub broadcast is switched to the recording. If the simulcast is not the main broadcast, the sub broadcast is not switched. By recording as it is, it is possible to prevent the user who wants to record the main broadcast from switching to a program different from the program that was recorded, and if it is a simulcast, it is interrupted by an alternative recorded sub broadcast. It is possible to record broadcast content without any problem. Furthermore, by combining a plurality of segmented broadcast data generated when switching between the main broadcast and the sub-broadcast for recording, and converting them into the same resolution and the same encoding method, as a consistent broadcast content It is possible to perform display that is reproducible and easy for viewers to be aware of switching between broadcasts.

(Embodiment 2)
Next, Embodiment 2 according to the present invention will be described. In the first embodiment, the recording is stopped after the recording end requirement is established, and the broadcast data is converted. In the second embodiment, the broadcast data is converted during the recording of the broadcast data. Here, since the configuration of the mobile phone terminal 1 in the second embodiment is the same as that in the first embodiment, the description thereof is omitted.

  Next, an outline of the switching process between the main broadcast and the sub broadcast when the main broadcast is recorded will be described. FIG. 7 is a flowchart of the switching recording process when the program that the user wants to record is the main broadcast. This switching recording process starts when an operation signal indicating the start of recording of the main broadcast is received from the operation unit 160 by a user operation or when the scheduled recording start time comes.

  First, the simulcast discrimination unit 112 discriminates whether or not the main broadcast and the sub broadcast are simulcasts (step S201).

  When it is determined that the broadcast is simulcast (step S201; Yes), the recording control unit 113 sends the broadcast data received and demodulated / decoded by the main broadcast receiving unit 130 to the broadcast data converting unit 114. Then, the broadcast data conversion unit 140 converts the broadcast data so that the encoding method and resolution of the broadcast data of the main broadcast become, for example, a predetermined encoding method and resolution stored in the storage unit 120 in advance. The subsequent broadcast data is recorded in the storage unit 120 (step S202). Hereinafter, the process in which the received broadcast data is directly sent to the broadcast data conversion unit 140 and converted and then stored in the storage unit 120 is referred to as “transcode recording”. Further, the recording control unit 113 accesses the storage unit 120 and records the current time acquired from the time measuring unit 116 as the recording start time of the main broadcast, and sets the recording flag to 1 and the simultaneous flag to 1.

  When it is determined that the broadcast is not simultaneous broadcasting (step S201; No), the recording control unit 113 starts recording the broadcast data received and demodulated / decoded by the main broadcast receiving unit 130 into the storage unit 120 (step S203). . In addition, the recording control unit 113 accesses the storage unit 120 and sets 1 to the recording flag and 0 to the simultaneous flag.

  Next, the recording control unit 113 determines whether or not the recording flag is 1, that is, whether or not currently recorded broadcast data is main broadcast data (step S204).

  When it is determined that the recording flag is 1 (step S204; Yes), the recording control unit 113 receives the operation signal for executing the recording of the main broadcast from the operation unit 111, and the control unit 110 receives the main signal from the reception quality measurement unit 111. Based on the measurement result of the broadcast reception quality, it is determined whether or not the main broadcast can be received (step S205). If it is determined that the main broadcast can be received (step S205; Yes), the recording control unit 113 returns to step S204 to continue recording the main broadcast. Note that whether or not the main broadcast and the sub broadcast can be received can be determined in the same manner as in the first embodiment, and thus the description thereof is omitted.

  When it is determined that the main broadcast cannot be received (step S205; No), the recording control unit 113 determines whether or not the sub broadcast can be received based on the measurement result of the reception quality of the sub broadcast from the reception quality measurement unit 111. Is determined (step S206). If it is determined that the sub broadcast cannot be received (step S206; No), since neither the main broadcast nor the sub broadcast can be received, the recording control unit 113 returns to step S204 and performs the above-described processing until reception is possible. repeat.

  If it is determined that the sub broadcast can be received (step S206; Yes), the recording control unit 113 determines whether the simul flag is 1, that is, whether the main broadcast and the sub broadcast are simulcasts ( Step S207). If it is determined that the main broadcast and the sub broadcast are not simulcast (step S207; No), the process returns to step S204 and the above-described processing is repeated.

  When it is determined that the main broadcast and the sub broadcast are simultaneous broadcasts (step S207; Yes), the recording control unit 113 switches the output source of the broadcast data to be recorded (step S208). For example, when the main broadcast broadcast data from the main broadcast reception unit 130 is currently being transcoded, the recording control unit 113 stops recording the main broadcast broadcast data and the sub broadcast reception from the sub broadcast reception unit 140. Start transcode recording of broadcast data. At this time, the broadcast data conversion unit 140 converts the broadcast data of the sub-broadcast so that the encoding method and resolution are the same as the encoding method and resolution of the broadcast data of the main broadcast, and converts the converted broadcast data to Record in the storage unit 120. If the sub-broadcast broadcast data from the sub-broadcast receiving unit 140 is currently being transcoded, the recording control unit 113 stops recording the sub-broadcast broadcast data, and the main broadcast from the main broadcast receiving unit 130 is recorded. Start transcode recording of broadcast data. Also, when transcode recording of sub-broadcast data is started, the current time acquired from the time measuring unit 116 is recorded as the main broadcast recording stop time and the sub-broadcast recording start time, and the recording flag is set to 0. . When transcode recording of the broadcast data of the main broadcast is started, the current time acquired from the time measuring unit 116 is recorded as the recording stop time of the sub broadcast and the recording start time of the main broadcast, and the recording flag is set to 1. . Note that the encoding method and resolution conversion of the main broadcast data and the sub broadcast data can be performed in the same manner as in the first embodiment, and thus description thereof is omitted.

  When it is determined in step S204 that the recording flag is not 1 (step S204; No), that is, when the sub broadcast is being recorded, the recording control unit 113 measures the reception quality of the main broadcast from the reception quality measurement unit 111. Based on the result, it is determined whether or not the main broadcast can be received (step S209). When it is determined that the main broadcast cannot be received (step S209; No), the recording control unit 113 returns to step S204 and repeats the above-described processing until reception is possible.

  On the other hand, when it is determined that the main broadcast can be received (step S209; Yes), the simulcast discriminating unit 112 again determines whether the main broadcast and the sub broadcast are simulcast (step S210). . The reason for determining the simulcast again in this way is that there is a possibility that the status of the simulcast has already changed and the simulcast is no longer available when the main broadcast can be received.

  If it is determined that the broadcast is a simulcast (step S210; Yes), the recording control unit 113 accesses the storage unit 120 and sets the simul flag to 1 (step S211). Thereafter, the process proceeds to step S208.

  When it is determined that the broadcast is not simulcast (step S210; No), the recording control unit 113 accesses the storage unit 120 and sets the simul flag to 0 (step S212). Thereafter, the process proceeds to step S204.

  The above processing is repeated until a recording end requirement such as reception of an operation signal indicating the stop of recording of the main broadcast from the operation unit 160 by a user operation or the arrival of the scheduled recording end time is satisfied. If neither the main broadcast nor the sub broadcast can be received, the recording control unit 113 may stop the recording until reception becomes possible, instead of continuing the recording as it is.

  If the recording end requirement is satisfied, the recording control unit 113 stops recording the broadcast data in the storage unit 120 (step S213).

  Then, the broadcast data combining unit 115 combines a plurality of broadcast data stored in the storage unit 120 having the same encoding method and resolution as broadcast data that can be reproduced as a consistent broadcast content, and records the combined data in the storage unit 120 ( Step S214). Then, the switching recording process ends. The combination of the main broadcast data and the sub broadcast data can be performed in the same manner as in the first embodiment, and thus the description thereof is omitted.

  In this way, if the broadcast is a simulcast, the main broadcast is transcoded. If the main broadcast is not received, the sub broadcast is transcoded. If not, the main broadcast is not switched to the sub broadcast. By performing normal recording as it is, it is possible to prevent the user who wants to record the main broadcast from switching to a program different from the program that was recorded, and if it is a simulcast, it is interrupted by an alternative recorded sub broadcast It is possible to record broadcast content without any problem. Furthermore, by transcoding and recording the main broadcast and sub-broadcast, and combining multiple pieces of broadcast data, it can be played back as a consistent broadcast content, and viewers are less conscious of switching between broadcasts and easy to see It is possible to display.

  In addition, this invention is not limited to said embodiment, A various deformation | transformation and application are possible.

In the first and second embodiments of the present invention, the switching recording process when the user wants to record the main broadcast has been described. However, for example, when the user desires to record the sub broadcast, the main broadcast and the sub broadcast are performed. In the case of simulcasting, even when the higher-quality main broadcast is preferentially recorded, and the portion that cannot be received by the main broadcast is desired to be recorded as a sub-broadcast, the above-described switching recording process can be used. Good.
Specifically, the switching recording process is started by receiving an operation signal indicating the start of sub-broadcast recording from the operation unit 160 by a user operation or when the start time of the reserved recording of the sub-broadcast has come. Then, the recording control unit 113 starts recording the broadcast data received and demodulated / decoded by the sub broadcast receiving unit 140 into the storage unit 105. Further, the recording control unit 113 accesses the storage unit 120 and sets 0 to the recording flag. Thereafter, the same processing as that after step S102 in FIG. 4 may be performed.
If the user wants to record the sub-broadcast but does not want to switch to the main broadcast, the sub-broadcast is continuously performed without determining whether the broadcast is receivable and whether it is a simulcast. Reception and recording may be performed.

  In Embodiment 1 and Embodiment 2 of the present invention, switching recording processing is performed in the case of simulcast, conversion of an encoding method and the like, and combination of divided broadcast data are performed. However, since the main broadcast data and the sub broadcast data recorded when the broadcast is not simulcast, only one of the broadcast data is recorded, it is not necessary to convert the encoding method. Moreover, about the main broadcast data and subbroadcast data recorded when it is not a simulcast, the division | segmentation main broadcast data may be couple | bonded and the division | segmentation subbroadcast data may be couple | bonded.

  In Embodiment 1 and Embodiment 2 of the present invention, as shown in FIG. 1 and FIG. 3, the main broadcast receiving unit 130 and the sub broadcast receiving unit 140 are configured separately, but as one broadcast receiving unit You may be comprised integrally. Specifically, it is possible to extract the main broadcast data and the sub broadcast data from the received broadcast signal using a full segment tuner that can receive both the main broadcast and the sub broadcast.

  In Embodiment 1 and Embodiment 2 of the present invention, when switching between the main broadcast and the sub broadcast, one recording is stopped and then the other recording is started. However, both main broadcast data and sub broadcast data may be recorded simultaneously without stopping the recording. In this case, both reception qualities are monitored, and the time when the time becomes larger than the predetermined reference value and the time when the time becomes smaller are stored in the storage unit 120. Based on the time stored after the recording is finished. Thus, broadcast data that has been successfully received and recorded may be cut out and combined.

  In Embodiment 2 of the present invention, the transcode recording is performed for both the main broadcast and the sub broadcast. However, when the encoding method and the resolution of either one of the broadcast data are unified, the broadcast data is transcoded. You don't have to. Specifically, when the sub-broadcast data encoding method and resolution are unified, the sub-broadcast data may be recorded as it is without transcode recording, and only the main broadcast data may be transcoded.

  In the first and second embodiments of the present invention, the case where both the main broadcast and the sub broadcast are digital broadcasts has been described. However, both broadcasts may not be digital broadcasts. For example, the sub broadcasts may be analog broadcasts. It may be. In this case, an analog broadcast tuner may be used as the tuner of the sub broadcast receiving unit 140.

  Note that the switching recording process executed by the mobile phone terminal 1 according to the first and second embodiments of the present invention can also be realized by a computer. For example, a program stored in the storage unit 120 of the mobile phone terminal 1 is stored in a computer such as a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), or an MO (Magneto-Optical disk). By storing and distributing in a readable recording medium and installing the program in a computer, an apparatus that executes the above-described processing can be configured.

  Further, the program may be stored in a disk device or the like included in a predetermined server device on a communication network such as the Internet, and may be downloaded onto a computer by being superimposed on a carrier wave, for example.

The above-described processing can also be achieved by starting and executing a program while transferring it via a communication network.
Furthermore, the above-described processing can also be achieved by executing all or part of the program on the server device and executing the program while the computer transmits and receives information regarding the processing via the communication network.

  Note that when the above functions are realized by sharing an OS (Operating System) or when the functions are realized by cooperation between the OS and an application, only the part other than the OS may be stored in a medium and distributed. Alternatively, it may be downloaded to a computer.

DESCRIPTION OF SYMBOLS 1 ... Cell-phone terminal, 110 ... Control part, 111 ... Reception quality measurement part, 112 ... Simultaneous broadcast discrimination | determination part, 113 ... Recording control part, 114 ... Broadcast data conversion part, 115 ... Broadcast data coupling | bond part, 116 ... Time measuring part, DESCRIPTION OF SYMBOLS 120 ... Memory | storage part, 130 ... Main broadcast receiving part, 131 ... Antenna, 140 ... Sub broadcast receiving part, 141 ... Antenna, 150 ... Communication part, 160 ... Operation part, 170 ... Display part, 180 ... Audio | voice output part, 21 ... Base station, 22 ... area with strong electric field strength, 23 ... area with low electric field strength, 31a, 31b, 31c ... sub broadcast data, 32a, 32b ... main broadcast data, 33a ... sub broadcast image example, 33b ... main broadcast Broadcast video example

Claims (8)

First broadcast receiving means for receiving a first broadcast signal;
Second broadcast receiving means for receiving a second broadcast signal;
Reception quality acquisition means for acquiring the reception quality of the first broadcast signal received by the first broadcast reception means and the second broadcast signal received by the second broadcast reception means;
Simultaneous broadcast discriminating means for discriminating whether or not the broadcast by the first broadcast signal and the broadcast by the second broadcast signal are substantially the same;
When it is determined that the simulcast broadcast is substantially the same, the first broadcast signal acquired by the reception quality acquisition unit and the first broadcast signal acquired based on the reception quality of the second broadcast signal. Selecting means for selecting at least one of the first broadcast signal received by the broadcast receiving means and the second broadcast signal received by the second broadcast receiving means;
Conversion means for converting the first broadcast signal and the second broadcast signal selected by the selection means into a common encoding method;
Coupling means for coupling the first broadcast signal and the second broadcast signal converted by the conversion means so as to be continuously reproducible broadcast data;
Storage means for storing broadcast data combined by the combining means;
A broadcast receiving and recording apparatus comprising: The conversion means converts the first broadcast signal and the second broadcast signal selected by the selection means into an encoding method of either the first broadcast signal or the second broadcast signal. Convert,
The broadcast receiving and recording apparatus according to claim 1. The conversion means converts the first broadcast signal and the second broadcast signal selected by the selection means into a common resolution,
The broadcast receiving and recording apparatus according to claim 1 or 2, The converting means may be configured such that the first broadcast signal and the second broadcast signal selected by the selecting means are between the resolution of the first broadcast signal and the resolution of the second broadcast signal. Convert to the resolution of
The broadcast receiving and recording apparatus according to any one of claims 1 to 3. Broadcast signal storage means for storing the first broadcast signal and the second broadcast signal selected by the selection means;
The converting means converts the first broadcast signal and the second broadcast signal stored in the broadcast signal storage means into a common encoding method;
The broadcast receiving and recording apparatus according to any one of claims 1 to 4, wherein the broadcast receiving and recording apparatus is provided. The selection means selects the first broadcast signal when it is determined that the reception quality of the first broadcast signal acquired by the reception quality acquisition means exceeds a predetermined value, and when it is determined that the reception quality does not exceed the predetermined value. Selecting a second broadcast signal;
The broadcast receiving and recording apparatus according to any one of claims 1 to 5, wherein The first broadcast signal is a digital high-definition broadcast signal,
The second broadcast signal is a one-segment broadcast signal.
The broadcast receiving / recording apparatus according to claim 1, wherein the broadcast receiving / recording apparatus is provided. Computer
First broadcast receiving means for receiving a first broadcast signal;
Second broadcast receiving means for receiving a second broadcast signal;
Reception quality acquisition means for acquiring the reception quality of the first broadcast signal received by the first broadcast reception means and the second broadcast signal received by the second broadcast reception means;
Simultaneous broadcast discriminating means for discriminating whether or not the broadcast by the first broadcast signal and the broadcast by the second broadcast signal are substantially the same;
When it is determined that the simulcast broadcast determination means is substantially the same, the first broadcast signal acquired by the reception quality acquisition means and the first broadcast signal acquired based on the reception quality of the second broadcast signal. Selecting means for selecting at least one of the first broadcast signal received by the broadcast receiving means and the second broadcast signal received by the second broadcast receiving means;
Conversion means for converting the first broadcast signal and the second broadcast signal selected by the selection means into a common encoding method;
Coupling means for coupling the first broadcast signal and the second broadcast signal converted by the conversion means so as to be continuously reproducible broadcast data;
Storage means for storing broadcast data combined by the combining means;
A program characterized by functioning as

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