JP2011139193A - Recording device and recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that, in a recording and reproducing device for recording and reproducing broadcast programs, recording content is sometimes compressed and recorded, but if the compression rate is enhanced, its recording efficiency on a recording medium during long-time recording is improved, while its image quality during reproduction deteriorates. <P>SOLUTION: A recording device is configured as follows. Compression parameters are calculated to achieve high-image-quality recording and excellent compression efficiency on the basis of information used for reproduction such as setting parameters of a high-image-quality processing part provided in a recording/reproducing device in addition to genre information of programs and setting parameters used for encoding content. The recording device compresses video images and sound data on the basis of the compression parameters to record them. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The technical field relates to an apparatus for recording and reproducing video and audio data.

  Regarding the above technical field, Patent Document 1 discloses that “optimally compressed recording is performed by determining the resolution and compression coding rate of a recorded program based on genre information indicated by an electronic program guide” (see Patent Document 1 [Summary]). As a means for solving this problem, “TV video is selected by the first information input means 1 as a channel and taken in as moving picture data, and is specified by the compression encoding unit 9 including sound information. The compression information is created at the compression coding rate, and the compression definition data adding unit 10 declares and adds the compression coding rate, and then the compression designated by the compression coding rate control unit 5 is recorded in the recording unit 11. The electronic program guide superimposed on the television image input to the second information input means 2 is decoded by the second information decoding unit 3 and stored as data 15. The compression coding rate is the data Refer to 15 Then, the compression coding rate setting table 4 is created, and the compression coding rate control unit 5 is activated and processed in accordance with the state of the input image data ”(see Patent Document 1 [Summary]). Has been.

  Patent Document 2 “provides a high-efficiency encoding / recording apparatus that performs optimal encoding processing with a small amount of code by controlling encoding for each scene” (see Patent Document 2 [Summary]). As a means for solving this problem, “based on the information on the genre of the video to be encoded by the genre / keyword search circuit and the image characteristic information obtained by the image characteristic calculation circuit from the digital image data of this video. Scene information based on scene characteristic information that represents the characteristics of each scene divided by the scene classification circuit and encoding result information on the code amount obtained by the code amount control circuit by encoding digital image data A correction value of a parameter for controlling the encoding process is acquired from the database 104 by the database management circuit 108, and the correction value is encoded by the acquired correction value. Parameter correction circuit 109 corrects the parameters of the high-efficiency coding recording apparatus 10 "has been described (Patent Document 2 [Summary See) that.

JP 2002-44604 A JP 2006-311078 A

  In a recording / reproducing apparatus capable of recording and reproducing a program broadcast as a stream by a broadcast wave, the recorded content may be compressed and recorded by an encoding method such as MPEG (Moving Picture Experts Group). In this case, if the compression rate is increased, the recording efficiency on the recording medium during long-time recording is improved, but on the other hand, the image quality (video quality) at the time of reproduction is lowered. Therefore, in order to perform recording in consideration of both the recording efficiency on the recording medium and the image quality at the time of reproduction, a mechanism for setting an appropriate compression rate is required.

  On the other hand, for example, in Patent Document 1, the compression rate is determined based on the genre information to which the program to be recorded belongs. Patent Document 2 further aims to increase the compression efficiency of the entire program by appropriately performing encoding processing by calculating the characteristics of image data for each scene.

  However, these inventions set the compression rate using only the attribute information of the program that is known at the time of recording, such as genre and scene, but particularly mention the use of information that should be considered at the time of playback. Not done. Therefore, the aspect of viewing the program with better image quality when the compressed content is reproduced is not considered.

  In order to solve the above-described problems, an embodiment of the present invention includes, for example, an input unit to which content is input, a recording unit that records the input content, and a compression unit that compresses the content when recording. An output unit that outputs the recorded content, and the compression unit is configured to perform content compression processing according to the display performance of a display device connected to the output unit.

  According to the above means, it is possible to record content efficiently, and the usability of the recording / reproducing apparatus can be further improved.

Diagram showing an example of broadcast reception 1 is a block diagram illustrating an example of a configuration of a recording / reproducing device according to a first embodiment. Sequence diagram showing an example of recording process of recording / reproducing apparatus Sequence diagram showing an example of compression parameter acquisition processing of the first embodiment FIG. 4 is a block diagram illustrating an example of a recording / reproducing apparatus according to a second embodiment. Sequence diagram showing an example of compression parameter acquisition processing of the second embodiment FIG. 9 is a block diagram illustrating an example of a recording / reproducing apparatus according to a third embodiment. Sequence diagram showing an example of compression parameter acquisition processing of the third embodiment FIG. 9 is a block diagram illustrating an example of a recording / reproducing apparatus according to a fourth embodiment. Sequence diagram showing an example of compression parameter acquisition processing of the fourth embodiment FIG. 9 is a block diagram illustrating an example of a recording / reproducing apparatus according to a fifth embodiment. Sequence diagram showing an example of compression parameter acquisition processing of the fifth embodiment FIG. 9 is a block diagram illustrating an example of a recording / reproducing apparatus according to a seventh embodiment. The figure which shows an example of the display method of the recorded program list screen in Example 8. FIG. The figure which shows an example of the display method of the recorded program list screen in Example 8. FIG.

  Hereinafter, an example (example) of the embodiment will be described. However, the present invention is not limited to this embodiment.

<Description of Broadcast Stream Reception Method in Digital Broadcasting>
FIG. 1 shows an example in which a digital broadcast broadcast by a terrestrial TV tower or a broadcasting satellite is received at home. A program transmitted from the broadcasting device 1 (such as a broadcasting station) is transmitted to the relay station 2 or 3 once. The relay station 2 uses a satellite, and the relay station 3 uses an antenna installed on the ground to place data on a predetermined carrier wave and transmit it to each home.

  In each home, for example, data transmitted from the relay station 2 or 3 is received using a receiving antenna and input to the digital broadcast receiver 4. It is assumed that the target digital broadcast receiving apparatus 4 in this embodiment has the function of a recording / reproducing apparatus (hereinafter, the digital broadcast receiving apparatus is unified as a recording / reproducing apparatus).

  The recording / reproducing apparatus 4 separates and decodes necessary data from the input data. A setting menu screen or the like necessary for the user to operate the apparatus is also generated in the recording / reproducing apparatus 4 and transmitted to the display apparatus 5 in combination with the decoded data.

  The display device 5 displays the transmitted video data on a panel and outputs audio data from a speaker. In addition to the above, an example of the input is the content distribution server 6 that transmits the broadcast via a network such as the Internet. An example of the output is another recording / playback device 7 (for example, a BD (Blu-ray Disc) / DVD (Digital Versatile Disc) recorder) that can be connected to the outside, such as an HDMI (High-Definition Multimedia Interface) cable. Connected with.

  Broadcast data sent from a broadcasting station includes not only video and audio data, but also subtitle data including character strings used for displaying subtitles, program information data describing the titles and contents of programs, names of performers, etc. Service information (SI: Service Information) and the like are included.

<Description of device configuration>
An example of the recording / reproducing apparatus according to the present embodiment is shown in FIG. An input terminal 201 is connected to an antenna for receiving digital broadcasting, a network terminal, and the like, and receives a digital broadcasting stream. The receiving unit 202 receives the input digital broadcast, and performs demodulation or descrambling as necessary to make the data format that the recording / reproducing apparatus 4 can handle. The separation unit 203 separates the data input from the digital broadcast reception unit 202 into video data, audio data, and other data (for example, subtitles and program information).

  The decoding unit 204 decodes and outputs the video / audio data separated by the separation unit 203 (in this example, the video decoding unit and the audio decoding unit are collectively referred to as a decoding unit). The image quality improvement processing unit 205 performs image quality improvement processing on the video data decoded by the decoding unit 204. The presence / absence of the operation of the image quality enhancement processing unit 205 and the magnitude of the processing effect may be determined by, for example, user settings or a software algorithm provided in the recording / reproducing apparatus 4.

The output terminal 206 can output a video to a display device such as a display or other display devices (in FIG. 2, the recording / reproducing device 4 does not include a display device, but may include the display device. It is assumed that a display device is connected to the output terminal 206).
The information analysis unit 207 acquires and analyzes the program information obtained from the separation unit 203 and information such as the setting value of the image quality improvement processing unit 205, and the conversion unit 208 converts the analysis result of the information analysis unit 207 into the compression parameter. Convert to The compression parameter here is a general term for parameters that affect the recording data after compression encoding, such as compression rate or bit rate, or image quality, used by tools and algorithms according to the format method used for compression encoding. Say.

  The compression unit 209 performs compression encoding based on the compression parameter obtained by the conversion unit 208. For example, in the case of digital broadcasting in Japan, broadcast data is transmitted in MPEG2-TS (Transport Stream) format. In this case, compression encoding includes, for example, bit rate conversion (translation, etc.), recording format conversion (encoding, transcoding). Etc.). As a specific example of recording format conversion, MPEG2 video data is converted to H.264 format. And conversion to 264-AVC (Advanced Video Coding).

  The recording unit 210 records data on the connected recording medium 211 (also performs processing such as encryption as necessary). Examples of the recording medium include a hard disk drive (HDD), a semiconductor memory, an optical disk such as a BD / DVD, a magnetic disk, and the like. The playback unit 212 reads the playback content from the recording medium 211 during playback, and sends it to the separation unit 203 (also performs a process of decrypting the encrypted content as necessary).

  A user I / F (InterFace) unit 213 receives a user operation from a remote controller or the like. The control unit 214 operates software included in the recording / reproducing apparatus 4 to interpret user operations and control each functional block. The memory 215 stores and accumulates various data as necessary. Each functional block is connected by a system bus 216 and can exchange data and transmit commands between the blocks.

  An example of the operation at the time of recording a broadcast program in this embodiment will be described. FIG. 3 shows an example of the processing procedure. In step (hereinafter referred to as S) 301, the recording / reproducing apparatus 4 receives a program to be recorded by the receiving unit 202 (and demodulates and descrambles as necessary), and has a data format that can be processed inside the recording / reproducing apparatus. To do. In S302, the separation unit 203 separates the data into video / audio / other data (for example, in the case of MPEG2, the type of data is discriminated by a numerical value called PID (Packet IDentifier) and is demultiplexed / separated). Is transmitted to the compression unit 209.

  In step S303, it is determined whether to perform compression recording. The setting of whether or not compression recording is necessary may be explicitly instructed by a user on a setting menu or the like, or may be automatically determined based on an algorithm set in advance by the recording / playback apparatus. When compression is performed in S303, the process proceeds to S304 to perform processing for specifying a compression parameter.

  When compression is not performed in S303, the process proceeds to S306. In S304, a preset value, a value calculated by a preset algorithm, a value designated by the user, or the like is prepared as a compression parameter for the compression encoding method to be used. In S305, compression processing is performed based on the compression parameter prepared in S304.

  In S306, a process for recording the data generated in the steps so far onto the recording medium is performed. The above is the video recording process. In the present embodiment, for simplification of description, it is assumed that only video data is compressed. However, audio and other data may be compressed.

  When the compression parameter is obtained in S304, there is a method in which data such as program information separated in S302 is analyzed by the information analysis unit 207 and the result is converted into a compression parameter by the conversion unit 208.

  Examples of compression parameters include H.264. When compression by 264-AVC is performed, for example, there are setting values indicating the magnitude of the effect of a tool that performs variable block size motion compensation, deblocking filter, weighted prediction, and the like.

  As a method of determining compression parameters in accordance with program attribute information, for example, it is assumed that there is a scene with a lot of movement if the genre information of the program is acquired, and if it is a sports program, the compression coding rate is lowered. For example, if a news program is set to maintain a high bit rate, it is estimated that there are few scenes with motion, and a compression encoding rate is increased to increase storage efficiency.

  In this embodiment, in addition to these, information such as a function provided in the image quality enhancement processing unit 205 and its set value is used. FIG. 4 shows a processing procedure corresponding to the internal processing of the compression parameter designation in S304 of FIG. 3 in this case.

  In S 401, data including program attribute information (for example, SI information) is acquired from various data separated by the separation unit 203. Subsequently, in S402, information of the image quality improvement processing unit 205 provided in the recording / reproducing apparatus 4 and set parameters are acquired. When the information analysis unit 207 acquires information such as a setting value of the image quality improvement processing unit 205, it is not always necessary to perform output from the output terminal 206 (for example, display by a display device connected to the output terminal 206). That is, the image quality improvement processing unit 205 does not have to operate. If the image quality improvement processing unit 205 is not operating, the initial setting of the image quality improvement processing unit stored in the memory 215 or the like is acquired, for example. This makes it possible to apply the method of this embodiment even when recording without viewing the digital broadcast.

  In S403, the information analysis unit 207 analyzes the program attribute information and the set value of the high image quality processing unit. In S404, conversion into compression parameters is performed according to a predetermined algorithm based on the analysis result in S403. The compression parameter is obtained as described above.

  For example, when the high image quality processing unit 205 can perform super-resolution processing, the resolution of the recorded program can be improved and displayed when played back by the present recording / playback apparatus. In the process of FIG. 4, the setting value held by the image quality improvement processing unit 205 is analyzed in S403, converted into a compression parameter in S404, and used at the time of compression. Become.

  For example, in a method called reconstruction method, which is a kind of super-resolution processing, a high-resolution image obtained by simply enlarging an original image is prepared, and the high-resolution image is based on a parameter group called an observation model. The low resolution image obtained by performing the resolution conversion is compared with the original image, and the pixel value of the high resolution image is interpolated and outputted so that the difference between them is small.

  The observation model is used, for example, to generate a comparative image to be analyzed using parameters composed of learning data, prior knowledge, or estimated values. This model includes various information for generating a low-resolution image from a high-resolution image such as blurring / blurring of the image, noise, movement and deformation.

  In the case of the image quality enhancement processing unit 205 capable of super-resolution processing, for example, various information corresponding to the observation model is acquired and analyzed by the information analysis unit 207 as set values, and together with the attribute information of the program, By converting the result into a compression parameter by the conversion unit 208 and performing compression recording, it can be expected that the effect of improving the image quality by super-resolution processing on the recorded data can be improved. In this example, when the recorded program is reproduced, the resolution can be improved by the super-resolution processing. For example, the setting of suppressing noise is applied in the processing of FIG. 4 instead of losing the resolution. , Compression can be performed in consideration of high image quality.

  By using the compression parameters obtained by the present embodiment and controlling the compression encoding so that the recording data has an appropriate image quality, for example, the bit rate (compression rate) of the video data and audio data of the recording data, Video data resolution, angle of view, GOP (Group Of Picture) structure, color difference format, frame rate, video brightness, saturation, gamma curve, contrast, sharpness (outline enhancement) / blurring, PSNR (Peak Signal- The parameter of the recording data itself, such as “to-Noise Ratio”, may be different from the case of compression recording without using this embodiment.

  Further, in this embodiment, it may be configured such that it is possible to select whether or not to determine the compression parameter using the setting value of the image quality improvement processing unit 205. That is, it may be possible to select not to use the setting value of the image quality enhancement processing unit 205.

  The selection of whether or not to determine the compression parameter using the setting value of the image quality enhancement processing unit 205 is performed by, for example, operating the user I / F unit 213 with a remote controller or the buttons of the recording / playback apparatus itself. It may be performed by any means such as operation. The parameter of the recording data changes depending on whether or not the setting value of the image quality enhancement processing unit 205 is used. According to the present embodiment, since the information compensated by the image quality enhancement process can be used during the compression process, the compression recording in consideration of the image quality becomes possible. Note that the types of compression parameters are not limited to the present embodiment. Further, the parameters of the recording data that change due to the application of this embodiment are not limited to the above.

  In this embodiment, when the recording / reproducing apparatus includes a display device, or when a display device is connected to the recording / reproducing apparatus, the display device matches the display performance such as the screen size and the display type. To set compression parameters.

  FIG. 5 shows an example of the configuration of the recording / reproducing apparatus (stream path during reproduction is omitted). The recording / reproducing apparatus 4 of FIG. 5 includes a display performance acquisition unit 501 that connects the display apparatus 5 to the recording / reproducing apparatus described in the first embodiment via an output terminal 206 and acquires information about the display performance of the display apparatus. It is intended to provide.

  The display performance acquisition unit 501 can acquire information such as the screen size of the display device 5 (hereinafter referred to as display performance information). For example, the display performance information is transmitted to the image quality improvement processing unit 205 to display the display device. It is possible to improve the image quality when displaying with.

  The display performance information is transmitted to the information analysis unit 207, and a compression parameter suitable for the display device can be obtained by conversion based on the analysis result.

  An example of the operation at the time of recording a broadcast program in this embodiment will be described. The processing at the time of recording is the same as the procedure shown in FIG. 3, but the processing shown in FIG. 6 is performed when the compression parameter is designated in S305.

  Similar to the first embodiment, in S401, data including attribute information of a program (for example, SI information) is acquired from various data separated by the separation unit 203. Subsequently, in S402, information of the image quality improvement processing unit 205 provided in the recording / reproducing apparatus 4 and set parameters are acquired. In this embodiment, in step S601, the display performance acquisition unit 501 acquires information representing the display performance of the display device connected to the recording / playback device.

  In FIG. 6, it is described that S601 is performed in parallel with S402, but it may be performed at an arbitrary timing such as sequentially before and after S402.

  In step S403, the information analysis unit 207 analyzes the program attribute information, the parameters of the image quality improvement processing unit, and the display performance information of the display device. In S404, conversion into compression parameters is performed according to a predetermined algorithm based on the analysis result in S403. The compression parameter is obtained as described above.

  The display performance information acquired by the display performance acquisition unit 501 includes, for example, a screen size. The parameter setting at the time of compression recording is changed according to the size of the screen. Examples of the type of display used in the display device include a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), an organic EL (Electro-Luminescence) display, and a Cathode Ray Tube (CRT). For example, the parameter setting at the time of compression recording is changed according to this type.

  In the case where a display device is connected to the recording / reproducing device and the display device includes an image quality improvement processing unit, the setting value of the image quality improvement processing unit may be acquired by the display performance acquisition unit 501 in S601 as well. Good.

  According to the present embodiment, effective recording can be performed by changing the image quality and the compression parameter in accordance with the performance of the display device. In the present embodiment, it is not always necessary to be performed simultaneously with the first embodiment. Also, the type of display performance information is not limited to this embodiment.

  In this embodiment, the usage environment of the recording / reproducing apparatus is detected, and the compression parameters are set so that the image quality suitable for viewing is obtained in the environment. FIG. 7 shows an example of the configuration of the recording / reproducing apparatus. The recording / reproducing apparatus 4 in FIG. 7 includes, in the recording / reproducing apparatus described in the first embodiment, an environment information acquisition unit that detects information (hereinafter, environmental information) such as illumination in a use environment, illuminance of external light, and color temperature. It is intended to provide. The environment information acquisition unit 701 can acquire information such as illuminance and color temperature that affects the image quality at the time of display in an environment where the recording / reproducing apparatus is installed. By transmitting to, it is possible to improve the image quality at the time of reproduction in accordance with the surrounding brightness and the type of illumination.

  Also, the environment information is transmitted to the information analysis unit 207, and it is possible to obtain a compression parameter suitable for the viewing environment at the time of recording by conversion based on the analysis result.

  An example of the operation at the time of recording a broadcast program in this embodiment will be described. The processing at the time of recording is the same as the procedure shown in FIG. 3, but the processing shown in FIG. 8 is performed when the compression parameter is designated in S305. In S 401, data including program attribute information (for example, SI information) is acquired from various data separated by the separation unit 203.

  Subsequently, in S402, information of the image quality improvement processing unit 205 provided in the recording / reproducing apparatus 4 and set parameters are acquired. In this embodiment, the environment information acquisition unit 701 acquires, for example, environment information at the time of recording in S801. In FIG. 8, it is described that S801 is performed in parallel with S402, but it may be performed at an arbitrary timing such as sequentially before and after S402.

  In S403, the information analysis unit 207 analyzes the program attribute information, the parameters of the image quality improvement processing unit, and the environment information. In S404, conversion into compression parameters is performed according to a predetermined algorithm based on the analysis result in S403.

  As described above, in addition to the image quality correction performed by the environment information acquisition unit 701 transmitting the environment information to the image quality enhancement processing unit 205 at the time of reproduction, the compression by the compression parameter using the environment information is performed in advance. The image quality during playback can be expected more.

  In addition to the method of using the environmental information during the recording of the program, the time zone frequently watched by the user is aggregated and analyzed and stored in the memory 215, the recording medium 211, etc., and the environmental information for that time zone is recorded. It is also conceivable to acquire the above and reflect it in the compression parameter.

  According to the present embodiment, effective recording is possible by compressing to an appropriate image quality suitable for the environment (viewing environment) in which the recording / reproducing apparatus is used. In the present embodiment, it is not always necessary to be performed simultaneously with the first embodiment. Further, it may be implemented in combination with the second embodiment. Also, the type of environment information is not limited to this embodiment.

  In this embodiment, the compression parameter is set so that the image quality is suitable when the user (viewer) of the recording / playback apparatus adjusts the image quality setting manually (user operation) according to his / her preference. . FIG. 9 shows an example of the configuration of the recording / reproducing apparatus (stream path during reproduction is omitted).

  The recording / reproducing apparatus 4 in FIG. 9 is the same as the recording / reproducing apparatus described in the first embodiment, but includes a parameter operation unit that allows the user to adjust the image quality setting. The parameter operation unit 901 can accept and interpret an image quality setting adjustment operation by a user's remote control operation or a button operation of the recording / playback apparatus via the user I / F 213, for example, and the adjustment value (hereinafter referred to as a user's adjustment value). The behavior of the image quality improvement processing unit 205 can be changed based on the setting information.

  Further, the user setting information is transmitted to the information analysis unit 207, and it is possible to obtain a compression parameter that matches the user preference by conversion based on the analysis result. The user set value is recorded in, for example, the memory 215, and the set value can be held once.

  An example of the operation at the time of recording a broadcast program in this embodiment will be described. The processing at the time of recording is the same as the procedure shown in FIG. 3, but the processing shown in FIG. 10 is performed when the compression parameter is designated in S305. In this embodiment, in S1001, the user setting value set by the parameter operation unit 901 and held in the memory 215, for example, is acquired. In FIG. 10, it is described that S1001 is performed in parallel with parameter acquisition of the image quality enhancement processing unit in S402, but it may be performed at an arbitrary timing such as sequentially before and after S402. A compression parameter is obtained based on these pieces of information.

  According to the present embodiment, effective recording can be performed by performing compression corresponding to the image quality according to the user's preference. In the present embodiment, it is not always necessary to be performed simultaneously with the first embodiment. Moreover, you may implement in combination with Example 2 and / or 3. Further, the user setting value setting method and the user setting value holding method are not limited to the present embodiment.

  In this embodiment, the compression parameter is set by setting a noise removal function provided in the recording / reproducing apparatus. FIG. 11 shows an example of the configuration of the recording / reproducing apparatus (stream path during reproduction is omitted). The recording / reproducing apparatus 4 shown in FIG. 11 is obtained by adding a noise removal setting unit 1101 to the recording / reproducing apparatus described in the first embodiment.

  A noise removal setting unit 1101 is connected to each functional block via a system bus, and holds settings for removing noise that may occur in, for example, the image quality improvement processing unit 205, the separation unit 203, and the decoding unit 204.

  An example of the operation at the time of recording a broadcast program in this embodiment will be described. The processing at the time of recording is the same as the procedure shown in FIG. 3, but the processing shown in FIG. 12 is performed when the compression parameter is designated in S305.

  In this embodiment, in S1201, noise removal setting parameters, that is, information such as which noise removal function is effective or how effective the noise removal function is are acquired. In FIG. 12, it is described that S1201 is performed in parallel with parameter acquisition of the image quality enhancement processing unit in S402, but it may be performed at an arbitrary timing such as sequentially before and after S402. A compression parameter is obtained based on these pieces of information.

  Examples of the noise removal function include digital noise reduction (NR) and mosquito noise removal.

  According to the present embodiment, it is possible to perform compression in consideration of the image quality changed by noise removal in addition to the image quality improvement by noise removal. In the present embodiment, it is not always necessary to be performed simultaneously with the first embodiment. Moreover, you may implement in arbitrary combinations with Example 2 thru | or 4. The type of the noise removal function is not limited to this embodiment.

  In addition to the first embodiment, the audio mode and audio encoding parameters are used. The audio data separated by the separation unit S202 is analyzed by the information analysis unit 207, and a compression parameter is obtained by the conversion unit 208 based on the encoding parameter when converted (encoded) into an audio mode or a broadcast stream. The processing procedure is the same as that in FIG.

  According to the present embodiment, it is possible to further enhance the effect of the first embodiment. The present embodiment may be implemented in any combination with the second to fifth embodiments.

  In the present embodiment, the recording / reproducing apparatus 4 performs compression encoding (encoding or transcoding) again on the video / audio data output from the image quality improvement processing unit 205 or the output terminal 206 by the compression unit 209, and after the conversion The output data can be recorded again by the recording unit 210 or transmitted to other devices via the network.

  FIG. 13 shows an example of the configuration of the recording / reproducing apparatus. In FIG. 13, the display data after the image quality correction output from the image quality improvement processing unit 205 is input to the compression unit 209. The compression unit 209 performs arbitrary compression encoding as in normal recording, and the recording unit 210 records it on the recording medium 211. Alternatively, the data is transmitted / distributed from the network output terminal 1302 to, for example, another recording / reproducing device via the network output unit 1301.

  The recorded programs obtained in the first to sixth embodiments are optimized for the recording / reproducing apparatus because the compression parameters are set using the information of the recording / reproducing apparatus (the second embodiment includes the display apparatus) itself. Become image quality. On the other hand, the recorded program obtained in the first to sixth embodiments is moved to another device via, for example, an optical disk such as a BD or a DVD or a removable HDD (for example, iVDR: Information Versatile Disk for Removable usage). If the recorded program is moved to another playback device or recording / playback device using a network or output terminal such as LAN (Local Area Network) or i-Link Compress and record again. In this case, the set value of the image quality improvement processing unit 205 is not used. Instead, compression parameters are used so that the image quality is appropriate when played back by another device that does not include an image quality enhancement processing unit.

  According to the present embodiment, when the recorded program obtained in the first to sixth embodiments is moved to another playback device or recording / playback device, data obtained by compression-encoding the data with high image quality is generated and moved again. Therefore, it is possible to convert a recorded program to an image quality that is generally higher in image quality than the image quality specialized for the recording / playback device that recorded the program, so it is suitable for playback on other devices. Is obtained.

  For example, it is also possible to convert (up-convert) a program that has been broadcast with standard image quality (SD) and recorded as it is into high definition image quality (HD) and record it again.

  In the first embodiment, high-quality compressed recording is performed using settings of functions (for example, a high-quality image processing unit) provided in a recording / reproducing apparatus that records a program, and this method is not used. You can choose. In this embodiment, there is provided a mechanism that allows the user to easily discriminate a program recorded by the method of the first embodiment.

  FIG. 14A shows an example of a screen display in the present embodiment. Reference numeral 1401 denotes a display device, and 1402 denotes a recorded program list screen for displaying a list of programs (recorded programs) recorded by the recording / reproducing device. As an example, the recorded program list screen 1402 displays the recording date of the program, the recording time, the recorded channel name, the recording mode classified by the compression rate (indicated as “mode” in FIG. 14), and the recorded program name. It is assumed that

  In this example, when “TS” is uncompressed recording (recording broadcast data as it is) and “TSE” is compressed and recorded at a bit rate equivalent to 1/2, “TSX8” is 1/8 of the bit rate. When the video is recorded after being compressed considerably, it represents. In the present embodiment, a column of “higher image quality” is added so that the content compressed and recorded by the method of the first embodiment can be easily identified (dotted line portion 1403). A program in which a circle “●” is displayed in this column indicates that the program is recorded by the method of the first embodiment (compressed and recorded using setting values such as a high image quality processing unit). .

  As another example, a dedicated recording mode may be provided. As shown in FIG. 14B, in addition to the recording mode indicating normal compressed recording (in this example, TSE, TSX8), another recording mode with “-SP” added at the end is prepared. The content recorded by this method is displayed in this recording mode.

  According to the present embodiment, it is possible to easily determine whether the program has been compressed and recorded according to the first embodiment or not, and the usability is improved (for example, the recorded program is moved to another device as described in the seventh embodiment). This makes it easier to determine whether or not to move after recompression recording). This embodiment may be implemented in combination with any of Embodiments 2 to 6. Further, the display method for easily discriminating and the name of the recording mode are not limited to the present embodiment.

1 Broadcasting equipment 2 Repeater (broadcasting satellite)
3 repeaters (TV tower)
4 Recording / playback device (digital broadcast receiver)
DESCRIPTION OF SYMBOLS 5 Display apparatus 6 Distribution server 7 Recording / reproducing apparatus 201 Input terminal 202 Receiving part 203 Separation part 204 Decoding part 205 Image quality improvement process part 206 Output terminal 207 Information analysis part 208 Conversion part 209 Compression part 210 Recording part 211 Recording medium 212 Reproduction part 213 User I / F unit 214 Control unit 215 Memory 216 System bus 501 Display performance acquisition unit 701 Environmental information acquisition unit 901 Parameter operation unit 1101 Noise removal setting unit 1301 Network output unit 1302 Network output terminal 1401 Display device 1402 Recorded program list screen 1403 High-quality compression mode display row 1404 Recording mode display row

Claims (12)

An input unit for inputting content;
A recording unit for recording the content input to the input unit;
A compression unit that compresses content when recording by the recording unit;
An output unit for outputting the content recorded in the recording unit,
The recording apparatus, wherein the compression unit performs compression processing of the content according to display performance of a display device connected to the output unit. A receiver for receiving broadcast waves;
A separation unit that separates video data, audio data, and other data from the broadcast wave received by the reception unit;
An information analysis unit that analyzes video data, audio data, and other data separated by the separation unit;
A decoding unit for decoding video data and audio data;
An image quality correction processing unit for correcting the image quality of the video data decoded by the decoding unit;
A display unit for displaying video data output from the image quality correction processing unit;
A recording unit for recording video data, audio data, and other data separated by the separation unit;
A compression unit that compresses data to be recorded based on an analysis result of the information analysis unit and an image quality correction parameter used in the image quality correction processing unit when recording video data and audio data in the recording unit; A recording apparatus. A conversion unit that converts parameters used in the image quality correction processing unit into compression parameters used in compression processing in the compression unit;
The image quality correction in the image quality correction processing unit is a super-resolution process that improves the resolution using one or more frames.
The recording apparatus according to claim 2, wherein the conversion unit converts a parameter used for super-resolution processing in the image quality correction processing unit into a compression parameter. A conversion unit that converts parameters used in the image quality correction processing unit into compression parameters used in compression processing in the compression unit;
The image quality correction processing unit obtains the size of the video that can be displayed by the display unit and the size of the set video, changes the image quality correction parameter according to the size of the video to be displayed,
The recording apparatus according to claim 2, wherein the conversion unit converts the changed image quality correction parameter into a compression parameter. An environment information detection unit for detecting information about an environment in which the recording apparatus is used;
A conversion unit for converting into compression parameters used in the compression processing in the compression unit based on the information detected by the environment information detection unit,
The recording apparatus according to claim 2, wherein the image quality correction processing unit changes the image quality correction parameter based on information about the environment detected by the environment information detection unit. A conversion unit that converts parameters used in the image quality correction processing unit into compression parameters used in compression processing in the compression unit;
3. The recording apparatus according to claim 2, wherein a parameter used in the image quality correction processing unit can be arbitrarily changed by a user of the recording apparatus.   The recording apparatus according to claim 2, further comprising a conversion unit that converts a compression parameter used in the compression unit based on a format of audio data analyzed by the information analysis unit. The recording device according to claim 2,
The compression unit compresses the video data output from the image quality correction processing unit again,
The recording unit records the data compressed again by the compression unit. The recording apparatus according to claim 8, comprising:
A network processing unit that transmits and receives data via a network is provided.
A recording apparatus that outputs data compressed again by the compression unit via the network processing unit Receiving a broadcast wave;
Separating video data, audio data, and other data from received broadcast waves;
Analyzing the separated video data, audio data, and other data;
Decoding video data and audio data;
Correcting the image quality of the decoded video data;
Displaying video data with corrected image quality;
Recording separated video data, audio data and other data;
A step of compressing data to be recorded based on a result of analyzing the audio data and other data and an image quality correction parameter used for image quality correction when recording video data and audio data;
A recording method comprising: The recording device according to claim 2,
The data compression processing in the compression unit can be selected to perform data compression processing without being based on the analysis result of the information analysis unit and the image quality correction parameter used in the image quality correction processing unit. Recording device. 12. The recording device according to claim 11, wherein
When displaying a list of recorded data, a display indicating whether the recorded data has been compressed based on the analysis result of the information analysis unit and the image quality correction parameter used in the image quality correction processing unit is performed. A recording apparatus.

Images