JP2011124825A - Recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recorder that displays a residual amount closer to a residual amount predicted by a user even during simultaneous recording. <P>SOLUTION: The recorder includes: a signal processing part for converting DR streams to AVC streams; an HDD for recording the AVC streams and simultaneously recording the DR streams when receiving an instruction to record the AVC streams and deleting the DR streams recorded simultaneously with the AVC streams when the recording of the AVC streams is completed; a CPU for calculating the size of a non-recorded where no data is recorded in the recording area of the HDD; and an OSD superimposing part for reporting the calculated size of the non-recorded area to a user. When the HDD is simultaneously recording the DR streams and the AVC streams, the CPU assumes the area where no data is recorded and the area where the DR streams are recorded in the recording area of the HDD as the non-recorded area, and calculates the size of the non-recorded area. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for recording a data stream such as a broadcast program with a built-in hard disk, for example.

  In digital television broadcasting, it is possible to broadcast a large amount of high-quality video data with a limited transmission capacity by transmitting a compressed data stream obtained by compressing and encoding a video signal by an MPEG encoding method ( Non-patent document 1).

  In order to record digital television broadcast data on a recording medium, there are stream recording in which a broadcast stream is recorded as it is and encoding recording in which the broadcast stream is compressed and recorded. Stream recording can be recorded with the same high image quality and high sound quality as broadcast quality, but requires a large recording capacity because the data bit rate is high at about 24 Mbps for BS broadcasting and about 17 Mbps for digital terrestrial broadcasting. become. On the other hand, in encoding recording, a broadcast stream is once decoded, and the decoded data is recompressed using MPEG encoding or the like. Coding noise is generated by recompression, but by compressing the bit rate to about 8 Mbps, the recording capacity can be reduced to 1/3 for BS broadcasting and 1/2 for terrestrial digital broadcasting. . In other words, recording can be performed for a long time by performing encoding recording.

  In addition, during broadcast recording, a stream that has been recorded on a medium such as an HDD or a DVD is played back. In particular, Patent Document 1 discloses a method for simultaneously performing recording and reproduction with a small number of decoder resources.

  In the method of Patent Document 1, stream recording and encoding recording are simultaneously performed on a recording target program for which the user desires encoding recording, and a decoder is required for reproducing other recording data until recording is completed. If not, stream recording data is deleted leaving the encoded recording data. If a decoder is required, the encoding recording data is deleted at that time, so that both recording and playback can be achieved even with a small number of decoders. Has been proposed.

JP 2009-146550 A

ISO / IEC 13818-2 (MPEG2 video)

  However, during simultaneous recording of both stream recording and encoding recording, the method of reducing the remaining amount display of the HDD displayed on the OSD is faster than when only the encoding recording desired by the user is performed. On the other hand, if the user does not operate the playback function that requires the decoder during simultaneous recording of the program, the stream recording is deleted by the instruction of the CPU when the program recording is completed, and thereafter the user assumes The remaining amount was displayed on the OSD. Thus, there are cases where the user is confused by displaying the remaining amount different from the user's assumption only during simultaneous recording.

  Accordingly, an object of the present invention is to provide an apparatus capable of displaying the remaining amount assumed by the user even during simultaneous recording in order to solve the above-described problem.

  In order to achieve the above object, the recording apparatus of the present invention receives a signal processing unit that converts a DR format stream into an AVC format stream, and an instruction to record an AVC format stream. While recording a stream, a DR format stream is simultaneously recorded. When recording of an AVC format stream is completed, an HDD that deletes the DR format stream recorded at the same time as the AVC format stream, and a recording area of the HDD The CPU includes a CPU that calculates the size of an unrecorded area, which is an area in which no data is recorded, and an OSD superimposing unit that notifies the user of the calculated size of the unrecorded area. When a DR format stream and an AVC format stream are simultaneously recorded, data is recorded in the HDD recording area. Are not even area and DR form streams considers areas recorded an unrecorded area, calculates the size of the unrecorded area.

  Thereby, it is possible to display a remaining amount closer to the remaining amount assumed by the user even during simultaneous recording.

  According to said structure, the recording / reproducing apparatus which can display the residual amount close | similar to the residual amount which a user assumes even during simultaneous recording can be provided.

1 is a configuration diagram of a recording / reproducing apparatus according to a first embodiment. 1 is a configuration diagram of a signal processing unit according to a first embodiment. Flowchart of simultaneous recording processing according to the first embodiment Flowchart of remaining amount display processing according to the first embodiment Relationship diagram between HDD usage area and remaining capacity calculation area according to the first embodiment Remaining amount display screen diagram according to the first embodiment

(Embodiment 1)
First, a method for recording a broadcast program will be described. FIG. 1 shows a configuration diagram of the recording apparatus 100. The tuner 102 receives a broadcast stream from an antenna 101 connected to the recording apparatus 100. Here, the broadcast stream received by the antenna 101 is MPEG2-TS. In addition, the tuner 102 inputs the received broadcast stream to the signal processing unit 103. The signal processing unit 103 inputs stream data obtained by processing the stream input from the tuner 102 to the HDD 106. The memory 104 stores an image generated by the CPU 105. Remote control receiving unit 107 receives a remote control signal transmitted from the remote control. The CPU 105 controls the tuner 102, the signal processing unit 103, the memory 104, and the HDD 106 in accordance with the remote control signal received by the remote control receiving unit 107. In addition, when the CPU 105 creates an image to be output, the CPU 105 outputs the image to the memory 104.

  FIG. 2 is a detailed configuration diagram around the signal processing unit 103, the memory 104, and the CPU 105. When performing encoding recording, the stream signal input to the signal processing unit 103 is input to the decoder 201. The decoder 201 decodes the input stream signal and outputs a video signal and an audio signal. The encoder 202 receives the video signal and audio signal output from the decoder 201. The encoder 202 encodes the input video signal and audio signal into AVC format stream data and inputs the encoded data to the HDD 106. Here, the AVC format is MPEG4-AVC defined by ISO / IEC 14496-10.

  When performing stream recording, the signal processing unit 103 inputs the signal to the HDD 106 without passing through the decoder 201 and the encoder 202. Of the signals input to the recording apparatus 100, a stream input to the HDD 106 without going through the encoder 202 is hereinafter referred to as a DR format stream. The HDD 106 records the AVC format or DR format stream input from the signal processing unit 103. The CPU 105 controls the tuner 102, signal processing unit 103, memory 104, HDD 106, and remote control receiving unit 107.

  With the above configuration, the broadcast stream received by the antenna 101 is recorded in the HDD 106 as a DR format or AVC format signal via the tuner 102 and the signal processing unit 103. The signal processing unit 103 can also output both the DR format and the AVC format simultaneously by distributing the input signal from the tuner 102 and encoding one side.

  Next, a method for reproducing stream data recorded on the HDD 106 will be described. The signal output from the HDD 106 is converted into a video signal and an audio signal by the decoder 201 and input to the OSD superimposing unit 203. The OSD superimposing unit 203 superimposes the video signal output from the decoder 201 and the OSD data received from the memory 104 and outputs the superimposed signal to the outside of the signal processing unit 103. The audio data output from the decoder 201 is output outside the signal processing unit 103 without passing through the OSD superimposing unit 203. The decoder 201, the encoder 202, and the OSD superimposing unit 203 are controlled by the CPU 105.

  With the above configuration, the stream recorded on the HDD 106 is reproduced.

  User operations will be described. The remote control receiving unit 107 receives a remote control operation by the user and inputs information to the CPU 105. The CPU 105 generates an OSD image based on the operation information and stores it in the memory 104.

  Next, with reference to FIG. 3, a description will be given of a process in which the recording apparatus 100 records a program that the user desires to record in the AVC format simultaneously in both the AVC format and the DR format. In S301, the CPU 105 waits for the start time of the reserved program to be recorded in the AVC format. In S302, the CPU 105 determines whether or not the unused area is sufficient even if both the AVC format and the DR format of the program to be recorded are simultaneously performed based on the size of the unused area of the HDD. The CPU 105 determines that recording is possible if there are not enough unused areas, and determines that recording is not possible if there are not enough unused areas. If recording is possible, the process proceeds to S303, and if not, the process proceeds to S312. In S303, the CPU 105 starts simultaneous recording in the AVC format and the DR format. In S304, the CPU 105 determines whether the recording is completed. If the video recording is completed, the CPU 105 proceeds to S311. If the recording has not been completed, the CPU 105 proceeds to S305. In step S <b> 305, the CPU 105 determines whether a user has received a playback instruction for a stream recorded in the HDD 106. If the CPU 105 has not received a reproduction instruction, the process returns to S304. When the CPU 105 receives a reproduction instruction, the process proceeds to S306. In S306, the CPU 105 stops recording in the AVC format. In S306, recording in the DR format is continued without being stopped. In step S307, the CPU 105 deletes the AVC format stream data whose recording has been stopped in step S306. In S308, the CPU 105 determines whether the recording is completed, and if not completed, returns to S308. If the recording is completed, the process proceeds to S309. In S309, the CPU 105 determines whether or not the decoder is in use, and proceeds to S309 if it is in use. If not in use, the process proceeds to S310. In S <b> 310, the CPU 105 converts the program recorded in the DR format in the HDD 106 into the AVC format through the decoder 201 and the encoder 202 in order, and records the program in the HDD 106. In S <b> 311, the CPU 105 deletes the DR format stream data recorded in the HDD 106. In S312, the CPU 105 starts recording in the AVC format only. In this case, since the decoder cannot be used for reproduction while continuing the recording, the reproduction cannot be performed. In S313, the CPU 105 determines whether the recording is completed. If completed, go to END. If not completed, the process proceeds to S313.

  As described above, even when AVC format stream data is recorded, not only the AVC format stream data but also the DR format stream data are recorded simultaneously. When recording of the AVC format stream data is completed, the DR format stream data recorded at the same time is deleted. If other stream data cannot be reproduced at the same time while AVC format stream data is being recorded, recording of the AVC format stream data is stopped when a reproduction instruction is accepted. At this time, recording of DR format stream data is continued. On the other hand, after the recording is finished, the DR format stream data is converted into the AVC format stream data at an appropriate timing. Then, the DR format stream data is deleted. The above operation is automatically executed by the recording apparatus 100 without the user being aware when the user instructs recording in the AVC format. In this way, even when AVC format stream data is being recorded, other contents can be reproduced.

  Next, an algorithm for displaying the remaining amount of the HDD 106 will be described with reference to FIG. In step S <b> 401, the CPU 105 determines whether a user has received an instruction to display the remaining amount of the HDD 106. If the determination instruction is not received, the process proceeds to S401. If a determination instruction is accepted, the process proceeds to S402. In S402, the CPU 105 determines whether or not the same program is currently recorded in both the AVC format and the DR format. If recording is in both AVC format and DR format, the process proceeds to S403. If recording is not in both AVC format and DR format, the process proceeds to S404. In S403, the CPU 105 calculates the size used for the remaining amount display as the sum of the size of the unused area of the HDD 106 and the size of the stream data of the program being recorded in the DR format (see FIG. 5). Here, the size of the unused area of the HDD 106 and the size of the DR format stream data being recorded on the HDD 106 are recorded on the HDD 106. The size of the unused area of the HDD 106 and the size of the DR format stream data being recorded on the HDD 106 can be calculated by reading the data recorded on the HDD 106.

  FIG. 5 is a diagram showing the relationship between the usage state of the HDD 106 and the magnitude of the remaining amount calculation in S403. The horizontal direction in FIG. 5 shows the recording area of the HDD 106. The “recorded area 51” is an area in which stream data of a program that has already been recorded is recorded. The “recorded area 52 of the program being recorded by AVC” indicates a recorded area of the stream data being recorded in the AVC format. “Recorded area 53 of program being recorded in DR” indicates a recorded area of stream data being recorded in the DR format. Note that the program recorded in the recorded area 52 of the program being recorded in AVC and the program recorded in the recorded area 53 of the program being recorded in DR in FIG. 5 are the same program. The “unused area 54” is an area where stream data is not recorded. When both the AVC format stream data and the DR format stream data are recorded on the HDD 106, the recorded area 52 of the AVC recording program and the recorded area 53 of the DR recording program are expanded. The unused area 54 is reduced.

  In the HDD 106, the areas actually used for recording are the recorded area 51, the recorded area 52 of the AVC recording program, and the recorded area 53 of the DR recording program. On the other hand, an unrecorded area is an unused area 54. However, since the recording of the DR format stream data is automatically executed as described above, the user cannot know that there is an area of the recorded area 53 of the program being recorded by DR. Therefore, when only the unused area 54 is presented to the user as an unused area as an unused area, a difference occurs between the area that the user considers to be an unused area and the presented unused area. Therefore, it is preferable that the area shown as the unused area is the sum of the recorded area 53 and the unused area 54 of the DR recording program. Therefore, in the recording apparatus 100 of the present embodiment, the areas that are shown to the user as unused areas are the recorded area 53 and the unused area 54 of the program being recorded by DR.

  In S404, simultaneous recording in the DR format is not performed. That is, there is no recorded area 53 of the program being recorded by DR. Therefore, the CPU 105 sets the size used for the remaining amount display as the unused area 54.

  In step S405, the CPU 105 converts the value used for the remaining amount display into a remaining time corresponding to the bit rate to be displayed. For example, in the case of DR recording, since it is 24 Mbps, the remaining time corresponding to it is calculated. In S406, when remote control receiving unit 107 accepts an instruction to display an OSD image, CPU 105 generates an image to be displayed on the screen as an OSD. The CPU 105 records the generated image in the memory 104. The OSD superimposing unit 203 reads an image recorded in the memory 104. The OSD superimposing unit 203 superimposes the read OSD image on the video signal and outputs it.

  FIG. 6 is an example of an image output from the OSD superimposing unit 203. In FIG. 6, the OSD image superimposed on the video output from the OSD superimposing unit 203 describes that the remaining recording time is 80 hours 30 minutes. The user can grasp the unused area of the HDD 106 by confirming the OSD image.

  That is, the recording apparatus 100 according to the present embodiment receives a signal processing unit 103 that converts a DR format stream into an AVC format stream and an instruction to record an AVC format stream. On the other hand, when the DR format stream is simultaneously recorded and the recording of the AVC format stream is completed, the HDD 106 that deletes the DR format stream recorded simultaneously with the AVC format stream, A CPU 105 that calculates the size of an unrecorded area, which is an area in which no data is recorded, and an OSD superimposing unit 203 that informs the user of the calculated size of the unrecorded area are provided. Format stream and AVC format stream are recorded at the same time In the recording area of the HDD 106, the area of the region and the DR format data is not recorded stream is recorded are regarded as unrecorded area, it calculates the size of the unrecorded area.

  As a result, when an AVC format stream is recorded and a DR format stream is recorded at the same time, the difference between the area that the user considers to be an unused area and the presented unused area is smaller. Can be provided.

  Further, in the recording apparatus 100 of the present embodiment, the information amount of the AVC format stream is smaller than the information amount of the DR format stream.

  In the recording apparatus 100 of the present embodiment, the CPU 105 calculates the recording time that can be recorded in the unrecorded area as the size of the unrecorded area of the HDD 106, and the OSD superimposing unit 203 performs the recordable recording. Announce time.

Thereby, the user can know the recording time that can be recorded in the CPU 105. Therefore, it is possible to know the recordable time more accurately as compared with the case where the amount of information that can be recorded on the CPU 105 is displayed in a capacity (for example, “5 GB” or the like).
(Other embodiments)
Embodiment 1 was illustrated as embodiment of this invention. However, the present invention is not limited to this. Therefore, other embodiments of the present invention will be described collectively below. In addition, this invention is not limited to these, It is applicable also to embodiment modified suitably.

  In the first embodiment, the encoder 202 is configured to output an AVC-format MPEG2-TS signal. However, for example, an MPEG2-PS signal may be output and recorded in the HDD 106.

  Further, the bit rate of the encoded signal output from the signal processing unit 103 is smaller than that of the stream input to the signal processing unit 103 from the tuner 102, and more programs are recorded than the stream direct recording. Is possible.

  Further, the stream to be reproduced does not need to be recorded in the HDD. For example, an external medium reading device such as a BD drive is incorporated in the recording device 100, and the stream data read from the external medium such as a BD-ROM is converted into the decoder 201. It is good also as a structure which inputs into and reproduces.

  In the present embodiment, stream data is acquired by broadcasting, but stream data may be acquired using other means such as downloading via the Internet.

  According to the recording / reproducing apparatus and the recording / reproducing method of the present invention, when the same program is simultaneously recorded in both the AVC format and the DR format, the remaining amount of HDD decreases more quickly than the user expects and the user is confused. Therefore, the present invention is useful as a recording / reproducing apparatus, a recording / reproducing method, and the like that are configured so that the number of decoders is reduced and recording and reproduction can be performed simultaneously.

DESCRIPTION OF SYMBOLS 100 Recording device 101 Antenna 102 Tuner 103 Signal processing part 104 Memory 105 CPU
106 HDD
107 Remote Control Reception Unit 201 Decoder 202 Encoder 203 OSD Superimposition Unit

Claims (3)

A signal processing unit for converting the first information stream into a second information stream;
When receiving an instruction to record the second information stream, the second information stream is recorded while the first information stream is simultaneously recorded,
A recording unit for deleting the first information stream recorded at the same time as the second information stream when the recording of the second information stream is completed;
A control unit that calculates the size of an unrecorded area, which is an area in which no data is recorded, of the recording area of the recording unit;
A notification unit for notifying the user of the size of the calculated unrecorded area;
With
The controller is
When the recording unit is recording the first information stream and the second information stream at the same time,
A recording apparatus that regards an area where no data is recorded and an area where the first information stream is recorded as an unrecorded area among the recording areas of the recording unit, and calculates the size of the unrecorded area . The recording apparatus according to claim 1, wherein an information amount of the second information stream is smaller than an information amount of the first information stream. The control unit calculates a recording time that can be recorded in the unrecorded area as the size of the unrecorded area of the recording unit,
The recording apparatus according to claim 1, wherein the notification unit notifies the recordable recording time.

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