JP6545091B2 - Recording and playback device - Google Patents

Description

  The present invention is a system for recording a stream of digital broadcast program corresponding to a plurality of resolutions and a plurality of encoding systems, a system for directly recording without changing specifications such as bit rate, and a system for changing and recording bit rates The present invention relates to a recording and reproducing apparatus compatible with both of the above.

  In recent years, a decoder (decoder) and an encoder (encoder) are mounted as a recording / reproducing device for recording digital signals of digital broadcast, and the bit rate of the digital signal is lowered and recorded, thereby making it possible to Some have made it possible to record. The process of lowering the bit rate of the digital signal is realized by the decoder temporarily decoding (decoding) the encoded and broadcast digital signal, and the encoder re-encodes it at a desired bit rate. .

  In this specification, a recording method in which a stream of digital signals is converted using a decoder and an encoder to convert specifications such as bit rate, recording mode, or encoding method is referred to as “re-encoding”, and the digital signal A recording method of direct recording without changing the specification is called "stream direct recording".

  In the recording and reproducing apparatus, in order to be able to simultaneously execute a plurality of processes using the decoder and the encoder, it is necessary to mount a plurality of the decoder and the encoder in the recording and reproducing apparatus. Therefore, when the decoder and encoder are realized by hardware, dedicated hardware is required, and the manufacturing cost of the recording and reproducing apparatus increases. Further, even when the decoder and the encoder are realized by software, a CPU (Central Processing Unit) having a higher processing capacity and a large capacity memory are required, which also increases the manufacturing cost.

  Therefore, for example, Patent Document 1 discloses a recording and reproducing apparatus that records a stream of digital signals on a recording medium by both stream direct recording and re-encoding recording. The recording / reproducing apparatus described in Patent Document 1 continues only stream direct recording and stops re-encoding recording when it is necessary to use a decoder and an encoder for other processing during re-encoding recording. Then, after the decoder and encoder are again available, perform re-encoding recording using the directly recorded stream. The recording and reproducing apparatus described in Patent Document 1 can perform simultaneous operations such as re-encode recording and reproduction of another stream during re-encode recording by performing the above operations without increasing the number of decoders and encoders. And

  However, in the recording / reproducing apparatus described in Patent Document 1, when it is necessary to use the decoder and encoder for other processing during stream recording, a stream directly recorded program requiring re-encoding recording remains on the recording medium. . When the decoder and encoder became available again, for example, after the user had finished using the recording and reproducing device and turned off the power with the remote control, the recording and reproducing device was interrupted in anticipation of a time zone not being used It is necessary to carry out the re-encoding recording process. In this specification, a re-encoding process performed after stream direct recording is referred to as “post-conversion process”.

  Post-conversion processing generally takes approximately the same time as program broadcast time. Therefore, when the user frequently uses the recording and reproducing apparatus, that is, when the time when the recording and reproducing apparatus is not used is relatively short, many streams waiting for the post conversion process remain in the recording medium. Also, for example, when the user turns on the recording / reproducing apparatus with the remote control during post-conversion processing, etc., the post-conversion processing is immediately interrupted to enable use of the decoder and encoder, and the stream post-conversion processed halfway Destroy Therefore, post-conversion processing of a long program such as a movie may not be completed easily, and post-conversion processing of a long program may not be completed.

  In order to solve the above problems, for example, in Patent Document 2, when there are a plurality of streams to be post-conversion processed in the recording medium, the recording time of the broadcast program, the attribute of the broadcast program, the genre of the broadcast program, the reproduction history A technique is disclosed that determines the order of post-conversion processing in accordance with predetermined priorities such as presence or absence, presence or absence of post-conversion processing interruption, or presence or absence of a viewing history.

JP, 2012-227577, A JP, 2014-216891, A

  On the other hand, according to the second interim report of the follow-up meeting on the 4K / 8K road map announced by the Ministry of Internal Affairs and Communications in July 2015, 4K / 8K practical broadcasts with higher resolution than the current 2K broadcast in 2018 It will be launched, and the current 2K broadcasting and 4K and 8K broadcasting are expected to coexist.

  In addition, MPEG (Moving Pictures Experts Group) 2 system, which is a video encoding system used in current 2K broadcasting, for 4K / 8K broadcasting, and H. H.264 / MPEG4-AVC (Advanced Video Coding) system (hereinafter referred to as "H.264 system"), and H.264 with high compression efficiency. 265 | It is also decided that the High Efficiency Video Coding (HEVC) system (hereinafter referred to as the “HEVC system”) is used. While HEVC has high compression efficiency, it has higher CPU processing power, larger memory and power consumption than MPEG2 when encoding broadcasted digital signals or decoding encoded streams. Need. For example, in the case of decoding in order to re-encode and record data recorded directly in a stream of 4K / 8K broadcasts broadcasted by the HEVC system, it is conceivable that inconveniences such as the operation of other devices may be restricted.

  Therefore, an object of the present invention is to provide a recording / reproducing apparatus capable of efficiently processing a program waiting for post-conversion processing.

  A recording / reproducing apparatus according to the present invention comprises a stream extraction unit that receives an encoded broadcast program and extracts a first stream, a stream storage unit that records the first stream extracted by the stream extraction unit, and A decoder unit that decodes the first stream read from the stream storage unit and converts it into a program signal; an encoder unit that encodes the program signal and converts it into a second stream; the stream extraction unit; Control unit configured to control operations of the unit, the decoder unit, and the encoder unit, and the control unit controls the plurality of first streams recorded in the stream storage unit to be video signals included in the first stream To the second stream in the order determined based on the information indicating the resolution or coding scheme of As to, and controls the decoder section and the encoder section.

  According to the present invention, the control unit is configured to determine the plurality of first streams recorded in the stream storage unit in the order determined based on the information indicating the resolution or encoding method of the video signal included in the first stream. The decoder unit and the encoder unit are controlled to encode into two streams.

  Therefore, it is possible to efficiently process a program waiting for post-conversion processing which requires decoding by the high resolution or high efficiency coding method.

FIG. 1 is a functional block diagram of a recording and reproducing device according to an embodiment. It is a figure which shows an example of the list | wrist of the program which performs post-conversion processing in the order determined by predetermined | prescribed priority. It is a figure which shows an example of the schedule which performs post-conversion processing in the order determined by predetermined | prescribed priority. It is a figure which shows an example of the list | wrist of the program which performs post-conversion processing in the order determined based on the information which shows resolution or an encoding system. It is a figure which shows an example of the schedule which performs post-conversion processing in the order determined based on the information which shows resolution or an encoding system.

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

<Configuration>
FIG. 1 is a functional block diagram of a recording and reproducing apparatus 100 according to the present embodiment. As shown in FIG. 1, the recording and reproducing apparatus 100 includes a stream extraction unit 102, a stream control unit 106, and a stream storage unit 107. The stream extraction unit 102 includes a tuner unit 102 a and a transport stream decoder unit 102 b (hereinafter, referred to as “TS decoder unit”).

  The recording / reproducing apparatus 100 further includes a decoder unit 108 and an encoder unit 110. The recording / reproducing apparatus 100 further includes a control unit 120, a ROM (Read Only Memory) unit 121, and a RAM (Random Access Memory) unit 122. Further, the recording / reproducing apparatus 100 further includes an operation instruction receiving unit 131 that receives a signal from an external operation instruction transmitting unit 130 (for example, a remote control). Each unit is connected to the control unit 120 by a bus line 123.

  The stream extraction unit 102 receives the encoded broadcast program and extracts a recording partial transport stream. More specifically, the tuner unit 102a receives 2K or 4K resolution from the external antenna 101, and uses the MPEG2, H.323, and so forth as a coding method. Receive an RF (Radio Frequency) signal including a plurality of digital broadcast channels compatible with H.264 or HEVC. Then, the tuner unit 102 a performs tuning processing and demodulation processing on an arbitrary broadcast radio frequency, and extracts a recording transport stream (hereinafter, referred to as “recording TS”). In the following description, “resolution” means the resolution of the video signal, and “coding method” means the coding method of the video signal, unless otherwise specified.

  The recording TS is input to the TS decoder unit 102b. The TS decoder unit 102 b extracts a recording partial transport stream (hereinafter, referred to as “first stream”) including only information (video information, audio information, and the like) necessary for reproduction from the recording TS. The first stream has a resolution of 2K or 4K, a coding scheme of MPEG2, H.264, H.264, H.264, H.264, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, and H.323. It supports H.264 or HEVC. The first stream is input to the stream control unit 106. The stream control unit 106 directly records the first stream in the stream accumulation unit 107. The stream storage unit 107 is realized by, for example, an HDD (Hard Disk Drive).

  The stream control unit 106 can also output the first stream input from the TS decoder unit 102 b to the decoder unit 108. The decoder unit 108 has a resolution of 2K or 4K, an encoding method of MPEG2, H.264, or the like. H.264 or HEVC decoding, and can output the decoded program signals (video signal and audio signal) to the encoder unit 110. The encoder unit 110 has, for example, a resolution of 2K or 4K and a coding method of MPEG2 or H.264. H.264, and can encode a received program signal (video signal and audio signal) to generate a partial transport stream for re-encoding and recording (hereinafter, referred to as "second stream"). In the present embodiment, for example, the second stream has a resolution of 2K and an encoding scheme of H.264. It is assumed that it corresponds to H.264. The second stream is recorded in the stream accumulation unit 107 via the stream control unit 106.

  The stream control unit 106 outputs, to the decoder unit 108, the first stream received from the TS decoder unit 102b when watching a program, and the first or second stream read from the stream storage unit 107 when playing a program. The decoder unit 108 decodes the first or second stream, generates a video signal and an audio signal, and outputs the video signal and the audio signal from the video / audio output terminal to an external display device, a speaker, or the like.

  The control unit 120 is realized by, for example, a microcomputer, operates according to a program code stored in the ROM unit 121, and uses the RAM unit 122 as a work area. The control unit 120 controls the operations of the tuner unit 102 a, the TS decoder unit 102 b, the stream control unit 106, the decoder unit 108, and the encoder unit 110 via the bus line 123.

  The operation instruction reception unit 131 receives an operation instruction of the user from the operation instruction transmission unit 130 configured by a remote control, an infrared transmitter, or the like. The operation instruction receiving unit 131 is connected to the control unit 120 via the bus line 123.

<Operation when watching a program>
When starting to view a digital broadcast program using the recording and reproducing apparatus 100, when the user presses the power key of the operation instruction transmission unit 130, the corresponding key code passes through the operation instruction reception unit 131 and the control unit 120. Sent to The control unit 120 controls the tuner unit 102a to tune it to an arbitrary channel frequency (generally, last tuned to the channel last viewed), and starts demodulation processing.

  When the demodulation process is completed, the control unit 120 controls the TS decoder unit 102b to extract and analyze information for specifying a program called PSI (Program Specific Information) information from the recording TS, and broadcast Data packets such as video and audio signals of a program are filtered to generate a first stream. The control unit 120 also extracts and analyzes program arrangement information called SI (Service Information) information that stores program attributes such as program titles and program genres.

  Next, the control unit 120 controls the stream control unit 106 to transmit the first stream to the decoder unit 108 as it is. The decoder unit 108 generates a video signal and an audio signal from the first stream. The video signal of digital broadcasting has a resolution of 2K or 4K, and is based on the MPEG2 system, H.264. It is encoded by the H.264 method or the HEVC method. Audio signals of digital broadcasting are data-compressed using a coding method such as AAC (Advanced Audio Coding) method.

  The control unit 120 includes the MPEG2, H.264, and the like embedded in the decoder unit 108. The first stream is decoded into uncompressed video and audio signals using an H.264 or HEVC decoder and an AAC decoder. The decoded video signal and audio signal are output as an audio / video output of the recording / reproducing apparatus 100 to an external display device, a speaker or the like. As described above, the user can view the video and audio of the program currently being broadcast on any channel.

<Program recording operation>
When the digital broadcast program currently being received is recorded using the recording / reproducing apparatus 100, the user presses the recording key provided in the operation instruction transmission unit 130, whereby the corresponding key code corresponds to the operation instruction reception unit 131. Are sent to the control unit 120 via Then, the control unit 120 starts the recording processing of the broadcast program. When viewing starts, the stream control unit 106 already uses MPEG2, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.323, H.264, H.264, H.323, H.264, H.323, H.264, H.323, H.264, H.264, H.323, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H The first stream corresponding to the H.264 or HEVC encoding scheme is input. Then, the control unit 120 controls the stream control unit 106 to record the first stream in the stream accumulation unit 107. By the above-described operation, the digital broadcast program being received is "stream directly recorded".

  Also, at the stage of starting recording, the stream control unit 106 outputs the first stream received from the TS decoder unit 102 b to the decoder unit 108. The resolution is 2K or 4K, the coding method is MPEG2, H.264, or H.264. The decoder unit 108 corresponding to H.264 or HEVC decoding generates a video signal and an audio signal from the first stream. In addition to this operation, the control unit 120 can also control the decoder unit 108 to output the decoded video signal and audio signal to the encoder unit 110. The control unit 120 controls the encoder unit 110 to encode the video signal and the audio signal to generate a second stream. Next, the control unit 120 controls the stream control unit 106 to record the second stream in the stream accumulation unit 107. By the above operation, the digital broadcast program being received is "re-encoded and recorded".

  Using the decoder unit 108 and the encoder unit 110, the resolution is 2K or 4K, and the coding method is MPEG2, H.264, H.264, H.264, H.264, H.264, H.264, H.264, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, and H.323. For example, the first stream corresponding to H.264 or HEVC decoding has a resolution of 2K and an H.264 encoding scheme. The stream specification can be changed by re-encoding to the second stream corresponding to H.264 decoding. Specifically, it is possible to reduce the bit rate of the second stream by changing the encoding scheme of the first stream or changing the resolution or frame rate. By reducing the bit rate, the recording capacity of the stream storage unit 107 can be saved. Alternatively, the resolution is 2K and the encoding scheme is H. 2 Changing to H.264 facilitates copying to a recording medium such as a Blu-ray disc that does not support 4K resolution or HEVC encoding.

  When the user presses the stop key provided in the operation instruction transmission unit 130, the corresponding key code is transmitted to the control unit 120 via the operation instruction reception unit 131. Then, the control unit 120 starts stop processing of the program recording operation currently being executed. The control unit 120 controls the stream control unit 106 to stop recording of the first and second streams in the stream storage unit 107.

  Note that only one of the stream direct recording operation and the re-encoding recording operation may be performed or may be performed simultaneously. Further, in the program viewing operation and the program recording operation described above, the user starts the operation by operating the operation instruction transmission unit 130. On the other hand, it is also possible to start the program recording operation by automatically activating the recording and reproducing apparatus 100 at the broadcast time of a program designated in advance, such as scheduled recording.

<Program playback operation>
When the digital broadcast program recorded in the stream storage unit 107 is reproduced using the recording / reproducing apparatus 100, the user presses the reproduction key provided in the operation instruction transmission unit 130 to obtain the corresponding key code. It is transmitted to the control unit 120 via the operation instruction receiving unit 131. Then, the control unit 120 starts the reproduction process of the broadcast program.

  The control unit 120 controls the stream control unit 106 to read the first or second stream recorded in the stream storage unit 107, that is, the recorded program stream, and transmits the read program stream to the decoder unit 108. Next, the control unit 120 controls the decoder unit 108 to generate a video signal and an audio signal from the first or second stream. The subsequent operation is the same as the program viewing operation, and hence the description is omitted.

  As described above, since it is necessary to use the decoder unit 108 at the time of program viewing and program reproducing operation, the re-encoding and recording operation can not be performed during program viewing and program reproducing operation. That is, since only stream direct recording can be performed at the time of program viewing and program reproduction, the first stream is once recorded directly as stream when performing re-encoding and recording. Then, when the decoder unit 108 becomes available, post-conversion processing is performed to perform re-encoding and recording operations.

<Post-conversion processing operation (2K / MPEG2)>
A case will be described where post-conversion processing of a stream directly recorded digital broadcast program (that is, the first stream) is performed in the stream storage unit 107 using the recording / reproducing apparatus 100. The control unit 120 controls the stream control unit 106 to read the first stream of the program that needs to be post-converted and recorded in the stream storage unit 107 by direct stream recording, and outputs the first stream to the decoder unit 108. Here, it is assumed that the first stream has a resolution of 2K and that the coding method is recorded by the MPEG2 method.

  Next, the control unit 120 controls the decoder unit 108 to output the decoded video signal and audio signal to the encoder unit 110. Next, the control unit 120 controls the encoder unit 110 to encode the received video signal and audio signal to generate a second stream. Here, for the second stream, the encoding method is changed from MPEG2 to H.264 with the resolution being 2K. It is assumed that the H.264 system has been changed. Then, the control unit 120 controls the stream control unit 106 to record the second stream in the stream accumulation unit 107. By the above operation, the recorded digital broadcast program is "post-converted".

  The stream specifications can be changed by re-encoding the directly recorded stream using the decoder unit 108 and the encoder unit 110. In the present embodiment, the bit rate of the second stream can be reduced by changing the coding method of the first stream to a method with higher compression efficiency. Therefore, the recording capacity of the stream accumulation unit 107 can be saved.

  As in the case of re-encoding, in the post-conversion processing operation, since it is necessary to use the decoder unit 108, the post-conversion processing operation can not be performed during program viewing and program reproduction operation. Therefore, post-conversion processing needs to be performed when the program playback operation is not being performed. The time when the program reproduction operation is not performed is, for example, a power off period after the user turns off the power of the recording and reproduction device 100.

  However, even if the post-conversion processing operation is started during the power-off period of the recording / reproducing apparatus 100, the control unit 120 immediately interrupts the post-conversion processing when the power is turned on during the post-conversion processing. The second stream generated halfway is deleted from the stream storage unit 107. This is to prevent the user from disturbing the program playback operation when instructed to do so.

  Generally, the time required for the post conversion process is almost the same as the program broadcast time, and therefore, when the user turns on the power of the recording / reproducing apparatus 100 as the post conversion process of the long broadcast time program is performed. There is a high possibility of interrupting the process.

  However, when the resolution is 2K and the encoding method is the MPEG2 method and the first stream is recorded, the stream direct recording operation can be performed even if the decoder unit 108 is used, In the case of a reserved recording operation that is not powered on by the user, it is possible to process in parallel with the post conversion processing by performing the reserved recording operation by stream direct recording.

<Post-conversion processing operation (4K / HEVC)>
On the other hand, the first stream recorded in the stream storage unit 107 has a resolution of 4K and the encoding scheme is recorded in the HEVC format, and the second stream has a resolution of 2K and an H.264 encoding scheme. The post-conversion processing operation when changing to the H.264 system will be described. The control unit 120 controls the stream control unit 106 to read the first stream of the program that needs to be post-converted and recorded in the stream storage unit 107 by direct stream recording, and outputs the first stream to the decoder unit 108.

  Next, the control unit 120 determines that the resolution is 2K or 4K, the encoding method is MPEG2, H.264, or the like. The decoder unit 108 corresponding to H.264 or HEVC decoding is controlled to output the decoded video signal and audio signal to the encoder unit 110. However, since the first stream has a resolution of 4K and the encoding scheme is recorded in the HEVC format, the decoder unit 108 requires more memory and CPU processing power during operation.

  Next, the control unit 120 controls the encoder unit 110 to encode the received video signal and audio signal to generate a second stream, and controls the stream control unit 106 to store the second stream as a stream accumulation unit. By recording in 107, the recorded digital broadcast program is "post-converted". However, since the resolution of the output of the decoder unit 108, that is, the resolution of the video signal to be input to the encoder unit 110 is 4K, the encoder unit 110 also requires more memory and CPU processing capability.

  Generally, by installing a large-capacity memory and a CPU capable of high-speed processing in the decoder unit 108 and the encoder unit 110, other processes are performed while processing the first and second streams of the 4K resolution or the HEVC system. For example, although it is possible to perform stream direct recording processing, the manufacturing cost of the recording and reproducing apparatus 100 is increased.

  Even if the memory capacity and CPU processing capacity of the decoder unit 108 and the encoder unit 110 are kept low, if the resolution of the first stream recorded in the stream storage unit 107 is 2K and the encoding method is the MPEG2 method, post conversion processing is in progress It is possible to perform stream direct recording operation. However, when the resolution of the first stream is 4K and the encoding method is HEVC, if the stream direct recording operation is performed, there is a possibility that the memory capacity and the CPU processing capacity are insufficient and simultaneous processing can not be performed. As a result, since there is a possibility that the scheduled recording operation and the post-conversion processing can not be processed in parallel, it is desirable not to simultaneously process the scheduled recording and post-conversion processing of the HEVC scheme with 4K resolution.

<Post-conversion processing order>
In the above-described post-conversion processing operation, when there are a plurality of programs (that is, first streams) which are recorded in the stream direct recording in the stream storage unit 107 and require different post-conversion processing or encoding methods, In the embodiment, the post-conversion processing is performed in the order determined based on the information indicating the resolution or coding method of the video signal included in the first stream.

  Next, the case where the post-conversion processing is performed in the order determined by the predetermined priority and the case where the post-conversion processing is performed in the order determined based on the information indicating the resolution or the coding method will be described in comparison.

  FIG. 2 is a diagram showing an example of a list of programs to be subjected to the post conversion process in the order determined by the predetermined priority, and FIG. 3 is an example of a schedule to perform the post conversion process in the order determined by the predetermined priority FIG. As shown in FIG. 2, the control unit 120 determines the order of post-conversion processing of a plurality of programs in accordance with predetermined priorities, and creates a list in advance. The list is stored, for example, in the RAM unit 122. It is assumed that a plurality of first streams corresponding to five programs A to E which require post-conversion processing are recorded in the stream storage unit 107.

  In FIG. 2, the post-conversion processing order indicates the order in which the post-conversion processing is performed. The recording date is the date when the program is recorded, the recording time is the length of the broadcast time of the program, the resolution is the resolution of the video signal, and the encoding method is the encoding method of the video signal.

  In the list shown in FIG. 2, the post-conversion processing order is determined based on the recording date and time of the program. That is, post-conversion processing is performed sequentially from the program with the oldest recording date and time. In the example shown in FIG. 2, post conversion processing is performed in the order of program A, program B, program C, program D, and program E.

  In the present embodiment, when the resolution of the program for which the post conversion processing is to be performed is 4K, such as program D or program E, and the encoding method is HEVC, simultaneous processing with the stream direct recording operation can not be performed. . Therefore, it is not preferable because the scheduled recording operation and the post conversion process can not be processed in parallel. Therefore, it is necessary to change the order of post-conversion processing, such as performing post-conversion processing by avoiding the time slot for recording reservation, instead of simply performing post-conversion processing in order from programs with older recording dates and times.

  This will be specifically described. For example, in FIG. 3, it is assumed that the recording reservation is set at 8:00 am after the user turns off the power of the recording / reproducing apparatus 100 at 0:00 am. After the power of the recording / reproducing apparatus 100 is turned off, post conversion processing is started, but when trying to process in the order of program A, program B, program C, program D, program E from the program with the oldest recording date and time, 4K resolution The processing of the program E and the recording reservation overlap in the HEVC coding scheme, and there is a possibility that it becomes necessary to interrupt either.

  Therefore, in the present embodiment, the order of post-conversion processing is determined based on information indicating the program resolution or coding scheme. More specifically, the control unit 120 performs an encoder to encode the first stream into the second stream preferentially in the order of high resolution of the video signal or in the order of high processing load of the coding method of the video signal. Control unit 110; In FIG. 4 and FIG. 5, after the user turns off the power supply of the recording / reproducing apparatus 100, the post-conversion processing is preferentially performed from the program of 4K resolution or HEVC coding scheme until the next recording reservation time.

  FIG. 4 is a diagram showing an example of a list of programs to be subjected to the post conversion process in the order determined based on the information indicating the resolution or the encoding method. FIG. 5 is a diagram illustrating an example of a schedule for performing post-conversion processing in an order determined based on information indicating resolution or coding scheme. In the present embodiment, post-conversion processing is performed in the order of program D, program E, program A, program B, and program C. Incidentally, in the program D and the program E, although the resolution and the encoding method are the same, post-conversion processing is first performed for the program D having a long recording time.

  As described above, regardless of the recording date and time, the H.264 video recording reservation and H.2K resolution are performed by preferentially post-converting the program D or the program E of the 4K resolution or HEVC encoding scheme. Since this is an overlap with the post conversion process of the program C of the H.264 encoding method, both can be compatible. Of course, the user may turn on the power of the recording / reproducing apparatus 100 during the post conversion process, but the probability that the post conversion process of all the programs can be completed must be increased.

<Effect>
As described above, in the recording / reproducing apparatus 100 according to the embodiment, the control unit 120 causes the plurality of first streams recorded in the stream storage unit 107 to be resolved or encoded for the video signal included in the first stream. The decoder unit 108 and the encoder unit 110 are controlled to encode the second stream in the order determined based on the information indicating the scheme.

  Therefore, it is possible to efficiently process a program waiting for post-conversion processing which requires decoding by the high resolution or high efficiency coding method.

  Also, post conversion processing is performed during a power off period after the recording / reproducing apparatus 100 is powered off, that is, the control unit 120 encodes the plurality of first streams recorded in the stream accumulation unit 107 into a second stream. To control the decoder unit 108 and the encoder unit 110. Therefore, high resolution or high efficiency coding can be performed without increasing the number of decoder units 108 and encoder units 110 or mounting a large capacity memory and a CPU capable of high-speed processing in decoder units 108 and encoder units 110. It is possible to efficiently process a program waiting for post-conversion processing that requires decoding by the scheme.

  Since the number of programs waiting for the post conversion process can be efficiently reduced, it is possible to efficiently increase the free space of the stream storage unit 107.

  The control unit 120 controls the encoder unit 110 to encode the first stream preferentially to the second stream in descending order of resolution of the video signal, so that the encoding can be performed in descending order of load on the memory and the CPU. . Therefore, it is difficult to interrupt the post-conversion process due to recording reservation and the like, and it is possible to suppress the waste of the power required for encoding.

  The control unit 120 controls the encoder unit 110 to preferentially encode the first stream into the second stream in descending order of the processing load of the video signal encoding method, so that the load on the memory and CPU is in descending order It can be encoded. Therefore, it is difficult to interrupt the post-conversion process due to recording reservation and the like, and it is possible to suppress the waste of the power required for encoding.

  In the present embodiment, the resolution of the video signal is 2K or 4K, and the coding method of the video signal is MPEG2, H.264, H.264, H.264, H.264, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323, and H.323. Although the resolution of the video signal may be 2K, 4K or 8K, the coding method of the video signal may be MPEG2, H.264 or H.264. H.264, MPEG 4-AVC, H.264. It may be H.265 or HEVC. Since the resolution of the video signal is 2K, 4K or 8K, it can correspond to a high resolution program. Also, the coding method of the video signal is MPEG2, H.264, H.264, H.264, H.323, H.323, H.323, H.323, H.323, H.323, H.323, H.323 and H.323. H.264, MPEG 4-AVC, H.264. Since the H.265 or HEVC is used, it is possible to cope with a coding method with high compression efficiency.

  In this embodiment, since both the program D and the program E in FIG. 4 have a resolution of 4K and the encoding scheme is the same in HEVC, the post-conversion processing order is set based on the information indicating the resolution and the encoding scheme. Although determined, if the resolution and the encoding method are different, the post-conversion processing order may be determined based on either the information indicating the resolution or the information indicating the encoding method.

  Further, in the present embodiment, the post-conversion process is started immediately when the recording / reproducing apparatus 100 is turned off, but the post-conversion process is generally performed in the midnight time zone which is 1:00 am or later where the audience rating is low. You may go. That is, the control unit 120 controls the decoder unit 108 and the encoder unit 110 so as to encode the plurality of first streams recorded in the stream accumulation unit 107 into the second stream in the late-night time zone. Therefore, by performing the post conversion process using a time zone with a low audience rating, the possibility of the user turning on the power of the recording and reproducing apparatus 100 during the post conversion process is reduced, and as a result, the post conversion process is interrupted. Can be reduced.

  Next, the industrial applicability of the present invention will be described. The present invention is not limited to an apparatus such as a digital broadcast recorder with built-in hard disk or a television receiver that receives broadcast programs corresponding to a plurality of resolutions and a plurality of encoding systems and displays them on an external or internal display. The present invention can be adopted to an apparatus for digitally recording and reproducing a broadcast program on a recording medium.

  In the present invention, within the scope of the invention, the embodiment can be appropriately modified or omitted.

  100 recording / reproducing apparatus, 102 stream extraction unit, 107 stream storage unit, 108 decoder unit, 110 encoder unit, 120 control unit.

Claims (7)

A stream extraction unit that receives the encoded broadcast program and extracts a first stream;
A stream storage unit for recording the first stream extracted by the stream extraction unit;
A decoder unit that decodes the first stream read from the stream storage unit and converts the first stream into a program signal;
An encoder unit that encodes the program signal and converts it into a second stream;
A control unit that controls operations of the stream extraction unit, the stream storage unit, the decoder unit, and the encoder unit;
Equipped with
The control unit is configured to determine the plurality of first streams recorded in the stream storage unit in an order determined based on information indicating resolutions or encoding methods of video signals included in the first streams. A recording / reproducing apparatus that controls the decoder unit and the encoder unit so as to encode the image data.   The recording according to claim 1, wherein the control unit controls the decoder unit and the encoder unit to preferentially encode the first stream to the second stream in descending order of resolution of the video signal. Playback device.   The control unit controls the decoder unit and the encoder unit so as to preferentially encode the first stream to the second stream in descending order of the processing load of the encoding method of the video signal. The recording and reproducing apparatus according to 1).   The recording and reproducing apparatus according to any one of claims 1 to 3, wherein the resolution of the video signal is 2K, 4K or 8K.   The coding method of the video signal is as follows: H.264, MPEG 4-AVC, H.264. The recording and reproducing apparatus according to any one of claims 1 to 3, which is H.265 or HEVC.   The control unit is configured to encode the plurality of first streams recorded in the stream storage unit into the second stream during a power off period after the power of the recording and reproducing apparatus is turned off. The recording and reproducing apparatus according to claim 1, further comprising: controlling the encoder unit.   The control unit according to claim 1, wherein the control unit controls the decoder unit and the encoder unit to encode the plurality of first streams recorded in the stream storage unit into the second stream in a late-night time zone. Recording and playback device.

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