JP4645401B2 - Recording apparatus and method, and program - Google Patents

Description

  The present invention relates to a recording apparatus and method, and a program, and more particularly, to a recording apparatus and method for recording an image, and a program.

  HDD (Hard Disk Drive) / DVD (Digital Versatile Disc) recorders that record programs of a plurality of channels at the same time are used.

  FIG. 1 is a block diagram showing the configuration of a conventional HDD recorder. The tuner 11-1 receives a program of a predetermined channel and supplies a composite signal of the received program to the ghost reducer 12-1. The ghost reducer 12-1 attenuates the ghost component included in the composite signal, and supplies the composite signal in which the ghost component is attenuated to the three-dimensional Y / C separation unit 13-1.

  The three-dimensional Y / C separation unit 13-1 separates the composite signal into a luminance signal and a color signal by taking a difference between the composite signals in the screen direction and the time direction of the image. The three-dimensional Y / C separation unit 13-1 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 14-1. The chroma decoder 14-1 decodes the color signal into a color difference signal. The chroma decoder 14-1 supplies the color difference signal and the luminance signal obtained by decoding to an MPEG (Moving Pictures Experts Group) encoder 15-1.

  The MPEG encoder 15-1 encodes the color difference signal and the luminance signal by the MPEG method, and supplies the image data obtained by the encoding to the HDD 16. The HDD 16 records the image data supplied from the MPEG encoder 15-1.

  The tuner 11-2 receives a program of a channel different from the channel of the program received by the tuner 11-1, and supplies a composite signal of the received program to the ghost reducer 12-2. The ghost reducer 12-2 attenuates the ghost component included in the composite signal, and supplies the composite signal in which the ghost component is attenuated to the three-dimensional Y / C separation unit 13-2.

  The three-dimensional Y / C separation unit 13-2 separates the composite signal into a luminance signal and a color signal by taking a difference between the composite signals in the screen direction and the time direction of the image. The three-dimensional Y / C separation unit 13-2 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 14-2. The chroma decoder 14-2 decodes the color signal into a color difference signal. The chroma decoder 14-2 supplies the color difference signal and the luminance signal obtained by decoding to the MPEG encoder 15-2.

  The MPEG encoder 15-2 encodes the color difference signal and the luminance signal by the MPEG system, and supplies the image data obtained by the encoding to the HDD 16. The HDD 16 records the image data supplied from the MPEG encoder 15-2.

  Since the tuner 11-1 through the MPEG encoder 15-1 and the tuner 11-2 through the MPEG encoder 15-2 independently supply image data to the HDD 16 in parallel, the HDD 16 can transmit two programs broadcast simultaneously. Image data can be recorded.

  In addition, when simultaneously recording N channel (CH) video signals, signals obtained by A / D converting the NCH video signals are stored, and pixels related to the frame images of the stored frame signals of the respective CHs. N CH frame memories that generate and output an image reduction frame signal that is reduced to 1 / m for thinning out and 1 / n for thinning out lines (where n = m × n is a natural number of 2 or more); A frame memory for storing each image reduced frame signal output from the N CH frame memories in an area divided for the image reduced frame signal; an encoder for encoding the output of the frame memory and supplying the output to the disk; (For example, refer to Patent Document 1).

JP 2002-369144 A

  However, in the conventional HDD recorder, the ghost reducer 12-1, the ghost reducer 12-2, the three-dimensional Y / C separation unit 13-1, the three-dimensional Y / C separation unit 13-2, the MPEG encoder 15-1, and the MPEG The circuit scale of the encoder 15-2 is large. The ghost reducer 12-1, the ghost reducer 12-2, the three-dimensional Y / C separation unit 13-1, the three-dimensional Y / C separation unit 13-2, and the MPEG encoder 15-1 The amount of processing executed in the MPEG encoder 15-2 is large.

  Therefore, if the number of programs to be recorded simultaneously is increased, the circuit scale of the apparatus increases or the processing amount increases in proportion to the number of programs to be recorded. This increases the cost required to realize the device (the device becomes expensive).

  In the invention described in Patent Document 1, the number of pixels decreases and the image quality deteriorates.

  The present invention has been made in view of such circumstances, so that a plurality of images can be recorded simultaneously without degrading the image quality and without significantly increasing the circuit scale or processing amount. To do.

A recording apparatus according to a first aspect of the present invention includes a first encoding unit that encodes a moving image into DV (Digital Video) first image data, and a first encoding unit that records the first image data. Recording means, conversion means for converting the recorded first image data into a composite signal, signal processing means for applying predetermined signal processing to the composite signal, and the composite to which the signal processing is applied Based on the signal, the moving image is encoded into second image data of the H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) system . 2, and the signal processing means applies the signal processing for attenuating a ghost component to the composite signal .

  The signal processing means can apply the signal processing for separating the luminance signal and the color signal in three dimensions into the composite signal.

In the recording method according to the first aspect of the present invention, the moving image is encoded into DV (Digital Video) first image data, the recording of the first image data is controlled, and the recorded first image is recorded. Image data is converted into a composite signal, predetermined signal processing is applied to the composite signal, and the moving image is converted to H.264 / AVC (ITU-T Rec) based on the composite signal to which the signal processing is applied. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) encoding the second image data, and the signal processing for attenuating a ghost component as the predetermined signal processing includes: Applied to the composite signal .

The program according to the first aspect of the present invention encodes a moving image into DV (Digital Video) first image data, controls recording of the first image data, and records the first image recorded therein. Image data is converted into a composite signal, predetermined signal processing is applied to the composite signal, and based on the composite signal to which the signal processing is applied, the moving image is converted to H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) method of encoding the second image data to a computer, and the signal for attenuating the ghost component as the predetermined signal processing Processing is applied to the composite signal .

In the first aspect of the present invention, the moving image is encoded into DV (Digital Video) type first image data, and recording of the first image data is controlled and recorded. Image data is converted into a composite signal, predetermined signal processing is applied to the composite signal, and based on the composite signal to which the signal processing is applied, the moving image is converted to H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) encoded second image data. The signal processing for attenuating a ghost component as the predetermined signal processing is applied to the composite signal .

A recording apparatus according to a second aspect of the present invention includes a first encoding unit that encodes a first moving image into DV first image data, and a second moving image as a second DV image. Second encoding means for encoding the image data, first recording means for recording the first image data and the second image data, and the recorded first image data or the Conversion means for converting the second image data into a composite signal, signal processing means for applying predetermined signal processing to the composite signal, and the recorded first image data or second image data. And third encoding means for encoding the first moving image or the second moving image into third image data of the H.264 / AVC format , wherein the third encoding means , By the composite signal to which the signal processing is applied, The first moving image or the second moving image is encoded into the third image data, and the signal processing means applies the signal processing for attenuating a ghost component to the composite signal .

  The signal processing means can apply the signal processing for separating the luminance signal and the color signal in three dimensions into the composite signal.

  Second recording means for recording the third image data can be further provided.

In the recording method according to the second aspect of the present invention, the first moving image is encoded into the first image data of the first method, and the second moving image is converted into the second image data of the first method. Encoding, controlling recording of the first image data and the second image data, converting the recorded first image data or the second image data into a composite signal, and converting the composite image into the composite signal Applying predetermined signal processing , the first moving image or the second moving image is converted into the H.264 / AVC format based on the recorded first image data or the second image data. Encoding to the third image data, and the first moving image or the second moving image is encoded to the third image data by the composite signal to which the signal processing is applied,
As the predetermined signal processing, the signal processing for attenuating a ghost component is applied to the composite signal .

The program according to the second aspect of the present invention encodes a first moving image into first image data of the first method, and encodes a second moving image into second image data of the first method. And controlling the recording of the first image data and the second image data, converting the recorded first image data or the second image data into a composite signal, And the first moving image or the second moving image is converted to the H.264 / AVC format first image data or the second moving image based on the recorded first image data or the second image data. 3, causing the computer to execute a step of encoding into the third image data, and encoding the first moving image or the second moving image into the third image data by the composite signal to which the signal processing is applied. The predetermined signal As sense, the signal processing for attenuating ghost component is applied to the composite signal.

In the second aspect of the present invention, the first moving image is encoded to the first image data of the first method, and the second moving image is encoded to the second image data of the first method. And recording of the first image data and the second image data is controlled, and the recorded first image data or the second image data is converted into a composite signal, and the composite signal is converted into the composite signal. Based on the first image data or the second image data recorded by applying predetermined signal processing , the first moving image or the second moving image is in the H.264 / AVC format . It is encoded into third image data. In addition, the first moving image or the second moving image is encoded into the third image data by the composite signal to which the signal processing is applied, and a ghost component is added as the predetermined signal processing. The signal processing to attenuate is applied to the composite signal .

  As described above, according to the first aspect of the present invention, an image can be recorded.

  In addition, according to the first aspect of the present invention, it is possible to simultaneously record a plurality of images without degrading the image quality and without increasing the circuit scale or the processing amount so much.

  According to the second aspect of the present invention, an image can be recorded.

  Further, according to the second aspect of the present invention, it is possible to record a plurality of images at the same time without degrading the image quality and without increasing the circuit scale or the processing amount so much.

  Embodiments of the present invention will be described below. Correspondences between constituent elements of the present invention and the embodiments described in the specification or the drawings are exemplified as follows. This description is intended to confirm that the embodiments supporting the present invention are described in the specification or the drawings. Therefore, even if there is an embodiment which is described in the specification or the drawings but is not described here as an embodiment corresponding to the constituent elements of the present invention, that is not the case. It does not mean that the form does not correspond to the constituent requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  The recording apparatus according to the first aspect of the present invention firstly includes first encoding means (for example, a DV encoder 34-1 in FIG. 2) that encodes a moving image into first image data of the first scheme. ), First recording means for recording the first image data (for example, HDD 35 in FIG. 2), and conversion means for converting the recorded first image data into a composite signal (for example, FIG. 2). Conversion unit 39), signal processing means (for example, signal processing unit 40 in FIG. 2) for applying predetermined signal processing to the composite signal, and the moving image based on the composite signal to which the signal processing is applied. 2nd encoding means (for example, AVC encoder 41 of FIG. 2) which encodes an image into 2nd image data of a 2nd system is provided.

  Secondly, the recording apparatus according to the first aspect of the present invention further includes second recording means (for example, HDD 42 in FIG. 2) for recording the second image data.

  The recording method or program according to the first aspect of the present invention encodes a moving image into first image data of a first method (for example, step S33 in FIG. 4), and controls recording of the first image data. (For example, step S34 in FIG. 4), the recorded first image data is converted into a composite signal (for example, step S52 in FIG. 5), and predetermined signal processing is applied to the composite signal (for example, step S52). Step S53 in FIG. 5) Based on the composite signal to which the signal processing is applied, the moving image is encoded into second image data of the second method (for example, step S56 in FIG. 5). including.

  The recording apparatus according to the second aspect of the present invention is a first encoding means for encoding the first moving image into the first image data of the first system (for example, the DV encoder 34-1 in FIG. 2). Second encoding means (for example, DV encoder 34-2 in FIG. 2) that encodes the second moving image into second image data of the first scheme, and the first image data and Based on the first recording means for recording the second image data (for example, the HDD 35 in FIG. 2) and the recorded first image data or the second image data, the first moving image is recorded. And third encoding means (for example, the AVC encoder 41 in FIG. 2) for encoding the image or the second moving image into the third image data of the second method.

  The recording apparatus according to the second aspect of the present invention comprises a conversion means (for example, the conversion unit 39 in FIG. 2) for converting the recorded first image data or the second image data into a composite signal, Signal processing means for applying predetermined signal processing to the composite signal (for example, the signal processing unit 40 in FIG. 2), and the third encoding means is configured to use the composite signal to which the signal processing is applied, The first moving image or the second moving image can be encoded into the third image data of the second method.

  The recording apparatus according to the second aspect of the present invention can further include second recording means (for example, HDD 42 in FIG. 2) for recording the third image data.

  The recording method or program according to the second aspect of the present invention encodes the first moving image into the first image data of the first method (for example, step S33 in FIG. 4), and converts the second moving image into the first moving image. The first image data is encoded into the second image data of the first system (for example, step S37 in FIG. 4), and the recording of the first image data and the second image data is controlled (for example, step S34 in FIG. 4 and Step S38), based on the recorded first image data or second image data, the first moving image or the second moving image is converted into third image data of the second method. It includes a step of encoding (for example, step S56 in FIG. 5).

  FIG. 2 is a block diagram showing the configuration of the recording apparatus according to the embodiment of the present invention. The recording apparatus includes a tuner 31-1 and a tuner 31-2, a one-dimensional Y / C separation unit 32-1 to a one-dimensional Y / C separation unit 32-4, a chroma decoder 33-1 to a chroma decoder 33-4, DV ( Digital Video) encoder 34-1 to DV encoder 34-4, HDD 35, ghost reference signal encoding unit 36-1, ghost reference signal encoding unit 36-2, input jack 37-1 and input jack 37-2, IEEE ( The Institute of Electrical and Electronic Engineers) includes a 1394 interface 38, a conversion unit 39, a signal processing unit 40, an AVC encoder 41, an HDD 42, and a control unit 43.

  Note that the sound may be processed together with the image or may be processed separately from the image, and the description of the sound is omitted in the following description. The image data may be multiplexed with audio data or may not include audio data.

  The tuner 31-1 is a tuner that receives a broadcast using an analog terrestrial wave as a medium, receives a program of a predetermined channel, and receives a composite signal of the received program as a one-dimensional Y / C separation unit 32-1. To supply. The one-dimensional Y / C separation unit 32-1 is configured by a filter, and separates the composite signal into a luminance signal and a color signal by separating components of the composite signal according to a frequency band. For example, the one-dimensional Y / C separation unit 32-1 separates the composite signal into a luminance signal and a color signal composed of an I signal and a Q signal. The one-dimensional Y / C separation unit 32-1 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 33-1.

  The one-dimensional Y / C separation unit 32-1 separates the composite signal into the luminance signal and the color signal so that the original composite signal can be obtained by recombining the separated luminance signal and the color signal. Preferably, the filter is complementary.

  The chroma decoder 33-1 decodes the color signal into a color difference signal based on the luminance signal and the color signal supplied from the one-dimensional Y / C separation unit 32-1. For example, the chroma decoder 33-1 decodes a Cr signal and a Cb signal as color difference signals. The chroma decoder 33-1 supplies the luminance signal and the color difference signal to the DV encoder 34-1.

  The DV encoder 34-1 encodes the luminance signal and the color difference signal supplied from the chroma decoder 33-1 in the DV format, thereby generating DV format image data. The DV encoder 34-1 supplies DV image data obtained by encoding to the HDD 35.

  The HDD 35 records DV format image data supplied from the DV encoder 34-1.

  The ghost reference signal encoding unit 36-1 encodes a ghost reference signal (ghost reference signal) included in the composite signal output from the tuner 31-1 by a predetermined method, and ghost reference data obtained by encoding. Is supplied to the HDD 35. For example, the ghost reference signal encoding unit 36-1 encodes the ghost reference signal by quantizing the ghost reference signal arranged in the vertical blanking period at a predetermined frequency.

  The HDD 35 records the ghost reference data supplied from the ghost reference signal encoding unit 36-1.

  The tuner 31-2 is configured similarly to the tuner 31-1, and is a tuner that receives a broadcast using an analog terrestrial wave as a medium. The tuner 31-2 receives a program of a predetermined channel, and composites the received program. The signal is supplied to the one-dimensional Y / C separation unit 32-2. Even if the tuner 31-2 receives a program of a channel different from the channel of the program received by the tuner 31-1, the program of the same channel as the channel of the program received by the tuner 31-1, that is, the same A program may be received.

  The one-dimensional Y / C separation unit 32-2 is configured in the same manner as the one-dimensional Y / C separation unit 32-1, and separates the composite signal into a luminance signal and a color signal. The one-dimensional Y / C separation unit 32-2 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 33-2.

  The chroma decoder 33-2 is configured in the same manner as the chroma decoder 33-1, and decodes the color signal into a color difference signal based on the luminance signal and the color signal supplied from the one-dimensional Y / C separation unit 32-2. The chroma decoder 33-2 supplies the luminance signal and the color difference signal to the DV encoder 34-2.

  The DV encoder 34-2 is configured in the same manner as the DV encoder 34-1, and generates DV format image data by encoding the luminance signal and the color difference signal supplied from the chroma decoder 33-2 in the DV format. . The DV encoder 34-2 supplies DV format image data obtained by encoding to the HDD 35.

  The HDD 35 records DV format image data supplied from the DV encoder 34-2.

  The ghost reference signal encoding unit 36-2 is configured in the same manner as the ghost reference signal encoding unit 36-1, and encodes the ghost reference signal included in the composite signal output from the tuner 31-2 by a predetermined method. The ghost reference data obtained by encoding is supplied to the HDD 35.

  The HDD 35 records the ghost reference data supplied from the ghost reference signal encoding unit 36-2.

  The input jack 37-1 is a so-called pin jack or the like, and a plug at one end of the cable having a plug at one end connected to a playback device (not shown) is connected to the input jack 37-1. A composite signal supplied from the playback device is input to the input jack 37-1, and the composite signal input to the input jack 37-1 is supplied to the one-dimensional Y / C separation unit 32-3.

  The one-dimensional Y / C separation unit 32-3 is configured in the same manner as the one-dimensional Y / C separation unit 32-1, and separates the composite signal input via the input jack 37-1 into a luminance signal and a color signal. To do. The one-dimensional Y / C separation unit 32-3 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 33-3.

  The chroma decoder 33-3 is configured in the same manner as the chroma decoder 33-1 and decodes the color signal into a color difference signal based on the luminance signal and the color signal supplied from the one-dimensional Y / C separation unit 32-3. The chroma decoder 33-3 supplies the luminance signal and the color difference signal to the DV encoder 34-3.

  The DV encoder 34-3 is configured in the same manner as the DV encoder 34-1, and generates DV format image data by encoding the luminance signal and the color difference signal supplied from the chroma decoder 33-3 by the DV format. . The DV encoder 34-3 supplies DV format image data obtained by encoding to the HDD 35.

  The HDD 35 records DV format image data supplied from the DV encoder 34-3.

  The input jack 37-2 is configured in the same manner as the input jack 37-1, and the input jack 37-2 has a plug at one end of the cable connected to a playback device (not shown). Connected. A composite signal supplied from the playback device is input to the input jack 37-2, and the composite signal input to the input jack 37-2 is supplied to the one-dimensional Y / C separation unit 32-4.

  The one-dimensional Y / C separation unit 32-4 is configured in the same manner as the one-dimensional Y / C separation unit 32-1, and separates the composite signal input via the input jack 37-2 into a luminance signal and a color signal. To do. The one-dimensional Y / C separator 32-4 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 33-4.

  The chroma decoder 33-4 is configured in the same manner as the chroma decoder 33-1, and decodes the color signal into a color difference signal based on the luminance signal and the color signal supplied from the one-dimensional Y / C separation unit 32-4. The chroma decoder 33-4 supplies the luminance signal and the color difference signal to the DV encoder 34-4.

  The DV encoder 34-4 is configured in the same manner as the DV encoder 34-1, and generates DV format image data by encoding the luminance signal and the color difference signal supplied from the chroma decoder 33-4 with the DV format. . The DV encoder 34-4 supplies DV image data obtained by encoding to the HDD 35.

  The HDD 35 records DV format image data supplied from the DV encoder 34-4.

  As described above, each of the DV encoder 34-1 to the DV encoder 34-4 encodes a moving image into first image data of a first method that is, for example, a DV method.

  Note that not only a composite signal for displaying an image at a normal speed but also a composite signal for displaying an image at a speed higher than the normal speed (for example, 60 feeds per second) is displayed on the input jack 37-1 or the input jack 37-2. May be inputted as a composite signal for displaying an image of 120 fields per second as an image of 120 fields per second.

  In this case, for example, the frequency of the carrier of the composite signal for displaying an image at a speed higher than the normal speed is set to a high frequency according to the speed of the image. The one-dimensional Y / C separation unit 32-3, the one-dimensional Y / C separation unit 32-4, the chroma decoder 33-3, and the chroma decoder 33-4 can process a composite signal having a higher carrier frequency. Composed. Furthermore, the DV encoder 34-3 and the DV encoder 34-4 are configured to be able to encode a luminance signal and a color difference signal according to an image at a speed higher than the normal speed by the DV method.

  The IEEE1394 interface 38 is configured to comply with the IEEE1394 standard, and is connected to, for example, digital video that records DV format image data. The IEEE1394 interface 38 acquires DV image data supplied from a digital video that records the connected DV image data, and supplies the acquired DV image data to the HDD 35.

  The HDD 35 records DV format image data supplied from the IEEE1394 interface 38.

  In this way, DV image data is recorded in the HDD 35.

  Since the tuner 31-1 to the DV encoder 34-1 and the tuner 31-2 to the DV encoder 34-2 independently supply DV format image data to the HDD 35 in parallel, the HDD 35 is broadcasted simultaneously. It is possible to record DV format image data for each program.

  Also, since the composite signal input to the input jack 37-1 and the composite signal input to the input jack 37-2 are independently converted into DV image data in parallel, the HDD 35 inputs simultaneously. Each of the image data obtained from the composite signal thus recorded can be recorded.

  Furthermore, the DV system image data of the program, the image data obtained from the externally input composite signal, and the DV system image data supplied from the IEEE1394 interface 38 are simultaneously and independently stored in the HDD 35. Will be recorded.

  As described above, the HDD 35 records the first image data of the first method that is the DV method, for example.

  In addition, although DV system was mentioned as an example of the 1st system of 1st image data encoding, it is not restricted to this, The 1st system of 1st image data encoding has a small amount of processing. Any method can be used. For example, a frame-enclosed coding method such as MPEG intra coding or motion JPEG (Joint Photographic Experts Group) can be adopted.

  The HDD 35 supplies any of the recorded image data to the conversion unit 39.

  The conversion unit 39 converts the first image data of the first method, for example, the DV method, recorded in the HDD 35 into a composite signal. The conversion unit 39 supplies the composite signal obtained by the conversion to the signal processing unit 40.

  The conversion unit 39 includes a DV decoder 51, a Y / C composite unit 52, and a ghost reference signal decoding unit 53.

  The DV decoder 51 decodes DV format image data recorded on the HDD 35 and supplies the luminance signal and color difference signal obtained by the decoding to the Y / C composite unit 52. The ghost reference signal decoding unit 53 is a ghost reference data encoded in the ghost reference signal included in the composite signal encoded in the image data decoded by the DV decoder 51, which is ghost reference data recorded in the HDD 35. Decrypt the data. The ghost reference signal decoding unit 53 supplies the ghost reference signal obtained by decoding to the Y / C composite unit 52.

  The Y / C combination unit 52 generates a composite signal by combining the luminance signal and color difference signal supplied from the DV decoder 51 and the ghost reference signal supplied from the ghost reference signal decoding unit 53. For example, first, the Y / C composite unit 52 generates a color signal from the luminance signal and the color difference signal supplied from the DV decoder 51. The Y / C combining unit 52 combines the color signal and the luminance signal by modulating the subcarrier with the generated color signal. The Y / C combining unit 52 generates a composite signal by further combining the ghost reference signal with the signal obtained as a result of the combining.

  The DV decoder 51 may generate a color signal from the luminance signal and the color difference signal, and supply the luminance signal and the color signal to the Y / C composite unit 52.

  The Y / C composite unit 52 supplies the generated composite signal to the signal processing unit 40.

  As described above, the signal processing unit 40 is supplied with the composite signal including the ghost reference signal.

  The signal processing unit 40 applies predetermined signal processing to the composite signal. The signal processing unit 40 supplies the AVC encoder 41 with the luminance signal and the color difference signal obtained from the composite signal as a result of the signal processing.

  The signal processing unit 40 includes a ghost reducer 54, a three-dimensional Y / C separation unit 55, and a chroma decoder 56.

  The ghost reducer 54 applies signal processing for attenuating the ghost component to the composite signal supplied from the conversion unit 39. For example, the ghost reducer 54 applies signal processing for attenuating a ghost component based on a ghost reference signal included in the composite signal to the composite signal. Note that when the ghost reference signal is not included in the composite signal, the ghost reducer 54 applies signal processing for attenuating the ghost component based on the luminance signal or the color signal to the composite signal.

  The ghost reducer 54 supplies the composite signal in which the ghost component is attenuated to the three-dimensional Y / C separation unit 55.

  The three-dimensional Y / C separation unit 55 separates the composite signal into a luminance signal and a color signal by taking a difference between the screen direction of the image and the time direction of the composite signal supplied from the ghost reducer 54. For example, the three-dimensional Y / C separation unit 55 separates the composite signal into a luminance signal and a color signal composed of an I signal and a Q signal. The three-dimensional Y / C separation unit 55 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 56.

  The chroma decoder 56 decodes the color signal into a color difference signal based on the luminance signal and the color signal supplied from the three-dimensional Y / C separation unit 55. For example, the chroma decoder 56 decodes a color signal composed of an I signal and a Q signal into a color difference signal that is a Cr signal and a Cb signal. The chroma decoder 56 supplies the luminance signal and the color difference signal to the AVC encoder 41.

  The AVC encoder 41 uses the H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) method to convert the luminance signal and the color difference signal supplied from the signal processing unit 40. To generate H.264 / AVC format image data. That is, for example, the AVC encoder 41 converts the moving image into the second moving image data by the second method having a large encoding processing amount compared to the encoding processing amount in the first method that is the DV method. Encode. The AVC encoder 41 supplies the generated H.264 / AVC format image data to the HDD 42.

  Note that the luminance signal and the color difference signal supplied from the signal processing unit 40 may be encoded by other methods such as the MPEG2 method or the MPEG4 method, not limited to the H.264 / AVC method.

  The HDD 42 records H.264 / AVC format image data supplied from the AVC encoder 41.

  The control unit 43 controls the entire recording apparatus.

  As described above, a plurality of systems for supplying image data to the HDD 35 are provided, whereas a system for processing image data recorded on the HDD 35 is one system.

  In the recording apparatus of FIG. 2, the system for processing the image data recorded in the HDD 35 is one system, and the AVC encoder 41 and the three-dimensional Y / C separation unit 55 are DV encoders 34-1 to 34-4. Regardless of the number, only one of each is provided.

  Similarly, in the recording apparatus of FIG. 2, only one ghost reducer 54 having a relatively large circuit scale or a relatively large processing amount is provided regardless of the number of DV encoders 34-1 to 34-4. It is done.

  The circuit scales of the DV encoder 34-1 to the DV encoder 34-4 are smaller than the circuit scale of the AVC encoder 41. Further, the processing amount (calculation amount) in each of the DV encoder 34-1 to the DV encoder 34-4 is smaller than the processing amount in the AVC encoder 41.

  The circuit scales of the one-dimensional Y / C separation unit 32-1 to the one-dimensional Y / C separation unit 32-4 are smaller than the circuit scale of the three-dimensional Y / C separation unit 55. Further, the processing amount (calculation amount) in each of the one-dimensional Y / C separation unit 32-1 to the one-dimensional Y / C separation unit 32-4 is compared with the processing amount in the three-dimensional Y / C separation unit 55. small.

  As described above, a process for supplying image data to the HDD 35 employs a process with a small processing amount (a circuit scale is small). Further, a system that processes image data recorded in the HDD 35 employs a higher-performance process with a large processing amount (large circuit scale).

  In this way, even if the number of systems for supplying image data to the HDD 35 is increased and the number of image data that can be recorded simultaneously is increased, the processing amount (circuit scale) of the entire apparatus does not increase so much. Regardless of the number of systems that supply image data to the HDD 35, the system that processes the image data recorded on the HDD 35 is one system, and therefore processing with a large processing amount (large circuit scale) is adopted here. However, the processing amount (circuit scale) of the entire apparatus is not so large.

  Further, since the image data of the program broadcast in real time is once recorded in the HDD 35 and the image data recorded in the HDD 35 is further processed, for example, the image processing cannot be completed in real time (for example, 30 minutes) Even signal processing or encoding processing with a large processing amount (such that one hour of processing time is required for this image) can be adopted in a system for processing image data recorded in the HDD 35.

  For example, the H.264 / AVC method, which has a larger processing amount than MPEG, can be used for encoding image data recorded in the HDD 35.

  In addition, since it is not necessary to consider processing time restrictions in encoding of image data recorded in the HDD 35, for example, the AVC encoder 41 can generate image data with higher image quality and higher compression rate. .

  As described above, a plurality of images can be recorded simultaneously without enlarging the circuit scale or the processing amount.

  Further, in the recording apparatus of FIG. 2, since the number of pixels or the picture is not thinned out, the image quality is not deteriorated.

  The HDD 35 may record the H.264 / AVC format image data supplied from the AVC encoder 41.

  Further, instead of the HDD 35 or the HDD 42, the image data may be recorded on a recording medium of another method such as an optical disk and its drive.

  The tuner 31-1 or the tuner 31-2 receives a broadcast using a digital terrestrial wave as a medium, or receives a broadcast using a digital satellite broadcast or a radio wave of satellite communication as a medium, or a cable TV or the like. The so-called cable broadcast may be received.

  Further, the conversion unit 39, the signal processing unit 40, and the AVC encoder 41 may process only image data to be stored for a long time out of the image data recorded in the HDD 35.

  The ghost reference signal encoding unit 36-1, the ghost reference signal encoding unit 36-2, and the ghost reference signal decoding unit 53 may be omitted. In this case, the Y / C combination unit 52 generates a composite signal by combining only the luminance signal and the color signal, and the ghost reducer 54 performs signal processing for attenuating the ghost component based on the luminance signal or the color signal. Is applied to this composite signal.

  Next, the recording process will be described with reference to the flowchart of FIG. In step S11, the tuner 31-1, the tuner 31-2, the one-dimensional Y / C separation unit 32-1 to the one-dimensional Y / C separation unit 32-4, the chroma decoder 33-1 to the chroma decoder 33-4, and the DV encoder The 34-1 to DV encoder 34-4, the HDD 35, the ghost reference signal encoding unit 36-1, and the ghost reference signal encoding unit 36-2 execute the first stage recording process. Details of the first stage recording process will be described later.

  In step S12, the control unit 43 determines whether or not the data amount of the program recorded in the designated area of the HDD 35, that is, the data amount of the image data exceeds a predetermined recording capacity. For example, in step S12, the controller 43 records the image recorded in the area of the HDD 35 in which image data for one hour, one day, or one week is recorded in a loop (ring buffer). It is determined whether the amount of data exceeds a predetermined recording capacity.

  If it is determined in step S12 that the amount of image data recorded in the designated area of the HDD 35 does not exceed a predetermined recording capacity, the process returns to step S11 to perform the first stage recording process. Is repeated.

  If it is determined in step S12 that the amount of image data recorded in the designated area of the HDD 35 has exceeded a predetermined recording capacity, the process proceeds to step S13, and the control unit 43 stores the image data in the HDD 35. One program is selected from the programs in which is recorded.

  In step S14, the control unit 43 determines whether or not the selected program is a program for which storage is specified. If it is determined that the program is for storage, the control unit 43 proceeds to step S15. The conversion unit 39, the signal processing unit 40, the AVC encoder 41, and the HDD 42 execute a second-stage recording process. Details of the second stage recording process will be described later.

  For example, in step S14, the control unit 43 refers to the metadata about the selected program, and when the selected program is a program reserved from the program table by the user's operation, the user selects the program. Since it is considered important, it is determined that the selected program is a program for which saving is designated.

  On the other hand, if it is determined in step S14 that the program is not designated to be saved, the process proceeds to step S16, and the control unit 43 determines whether or not to record the selected program on the DVD, and determines to record on the DVD. If YES in step S15, the process advances to step S15, and the conversion unit 39, the signal processing unit 40, the AVC encoder 41, and the HDD 42 execute a second-stage recording process.

  Note that the image data of the program determined to be recorded on the DVD is preferably encoded by the MPEG2 method in the second stage recording process. That is, if it is determined to record on a desired recording medium, if the image data is pre-encoded in a method corresponding to the recording medium in the second stage recording process, the recording medium can be quickly stored. Image data can be recorded.

  After step S15, the procedure proceeds to step S18.

  If it is determined in step S16 that the data is not recorded on the DVD, the process proceeds to step S17, and the control unit 43 causes the HDD 35 to delete the image data of the selected program, and the process proceeds to step S18.

  In step S18, the control unit 43 determines whether all the programs recorded in the designated area of the HDD 35 have been processed, and if it is determined that all the programs have not been processed, Returning to S13, the next program is selected, and the processing from step S14 to step S17 is repeated.

  If it is determined in step S18 that all programs have been processed, the process returns to step S11, and the first stage recording process is repeated.

  For the convenience of explaining the processing in the flowchart, the first-stage recording process and the second-stage recording process have been described as being executed in series. The process and the second stage recording process are executed in parallel. That is, during the execution of the first stage recording process in step S11, the processes in steps S12 to S18 are executed.

  FIG. 4 is a flowchart for explaining the details of the first stage recording process corresponding to step S11 of FIG. In step S31, the one-dimensional Y / C separation unit 32-1 separates the first composite signal supplied from the tuner 31-1 into a luminance signal and a color signal in one dimension. For example, in step S31, the one-dimensional Y / C separation unit 32-1 separates the first composite signal supplied from the tuner 31-1 into components of the composite signal according to the frequency band, Separated into color signals consisting of I and Q signals. The one-dimensional Y / C separation unit 32-1 supplies the luminance signal and the color signal separated from the first composite signal to the chroma decoder 33-1.

  In step S32, the chroma decoder 33-1 decodes the color signal separated from the first composite signal into a color difference signal based on the luminance signal and the color signal separated from the first composite signal. For example, in step S32, the chroma decoder 33-1 obtains a Cr signal and a Cb signal as color difference signals by decoding. The chroma decoder 33-1 supplies the luminance signal and the color difference signal obtained from the first composite signal to the DV encoder 34-1.

  In step S <b> 33, the DV encoder 34-1 encodes the luminance signal and the color difference signal obtained from the first composite signal in the DV format, and generates DV format image data. The DV encoder 34-1 supplies the image data generated from the first composite signal to the HDD 35.

  In step S34, the HDD 35 records DV format image data obtained from the first composite signal.

  In parallel with the processing of step S31 to step S34, the ghost reference signal included in the first composite signal output from the tuner 31-1 is encoded by a predetermined method in the ghost reference signal encoding unit 36-1. The ghost reference data obtained by encoding is recorded on the HDD 35.

  Further, steps S35 to S38 are executed in parallel with steps S31 to S34.

  In step S35, the one-dimensional Y / C separation unit 32-2 separates the second composite signal supplied from the tuner 31-2 into a luminance signal and a color signal in one dimension, similarly to the process in step S31. . The one-dimensional Y / C separation unit 32-2 supplies the luminance signal and the color signal separated from the second composite signal to the chroma decoder 33-2.

  In step S36, the chroma decoder 33-2 receives the color signal separated from the second composite signal based on the luminance signal and the color signal separated from the second composite signal, as in the process of step S32. Decode into color difference signal. The chroma decoder 33-2 supplies the luminance signal and the color difference signal obtained from the second composite signal to the DV encoder 34-2.

  In step S37, the DV encoder 34-2 encodes the luminance signal and the color difference signal obtained from the second composite signal in the DV format, similarly to the processing in step S33, and generates DV format image data. The DV encoder 34-2 supplies the image data generated from the second composite signal to the HDD 35.

  In step S38, as in the process of step S34, the HDD 35 records DV format image data obtained from the second composite signal, and the process ends.

  In parallel with the processing of step S35 to step S38, the ghost reference signal included in the second composite signal output from the tuner 31-2 is encoded by a predetermined method in the ghost reference signal encoding unit 36-2. The ghost reference data obtained by encoding is recorded on the HDD 35.

  In this manner, DV system image data of two programs broadcast simultaneously are recorded in the HDD 35, respectively.

  Further, when a composite signal is input from the input jack 37-1 or the input jack 37-2, the input jack 37-1 or the processing is the same as the processing from step S31 to step S34 or the processing from step S35 to step S38. DV format image data is generated from the composite signal input to the input jack 37-2, and the DV format image data is recorded in the HDD 35. This process is also executed in parallel with the processes in steps S31 to S38.

  Furthermore, the process of recording DV image data supplied from the IEEE1394 interface 38 in the HDD 35 is also executed in parallel with these processes.

  In this manner, a plurality of DV format image data is generated in parallel, and each image data is recorded in the HDD 35. Since each image data is generated by processing with a small processing amount, even if the number of image data generated in parallel is increased, the overall processing amount does not increase so much.

  Next, the second stage recording process will be described.

  FIG. 5 is a flowchart for explaining the details of the second stage recording process corresponding to step S15 in FIG. In step S51, the DV decoder 51 of the conversion unit 39 reads the DV format image data of the program selected in the process of step S13 from the HDD 35, decodes the read DV format image data, and obtains the decoding result. The luminance signal and the color difference signal are supplied to the Y / C composite unit 52.

  In step S52, the Y / C combination unit 52 of the conversion unit 39 generates a composite signal by combining the luminance signal and the color difference signal obtained by the decoding in step S51. When ghost reference data obtained by encoding the ghost reference signal included in the composite signal encoded in the image data to be decoded in step S51 is recorded in the HDD 35, the ghost reference signal decoding unit 53 causes the ghost reference data decoding unit 53 to The reference data is decoded, and in step S52, the Y / C combination unit 52 combines the luminance signal and the color difference signal, and further combines the ghost reference signal obtained by the decoding to generate a composite signal. The Y / C composite unit 52 supplies the generated composite signal to the signal processing unit 40.

  In step S <b> 53, the ghost reducer 54 of the signal processing unit 40 attenuates the ghost component of the composite signal and supplies the composite signal in which the ghost component is attenuated to the three-dimensional Y / C separation unit 55.

  In step S54, the three-dimensional Y / C separation unit 55 of the signal processing unit 40 separates the composite signal into a luminance signal and a color signal in three dimensions. For example, the three-dimensional Y / C separation unit 55 takes the composite signal in which the ghost component is attenuated by taking a difference between the screen direction and the time direction of the image, thereby converting the composite signal into the luminance signal, the I signal, and the Q signal. The signal is separated into color signals. The three-dimensional Y / C separation unit 55 supplies the luminance signal and the color signal obtained by the separation to the chroma decoder 56.

  In step S55, the chroma decoder 56 decodes the color signal into a color difference signal based on the luminance signal and the color signal separated from the composite signal. For example, in step S55, the chroma decoder 56 decodes a color signal composed of an I signal and a Q signal into a color difference signal that is a Cr signal and a Cb signal. The chroma decoder 56 supplies the luminance signal and the color difference signal to the AVC encoder 41.

  In step S56, the AVC encoder 41 encodes the luminance signal and the color difference signal obtained by the decoding with the H.264 / AVC format to generate H.264 / AVC format image data. The AVC encoder 41 supplies the generated H.264 / AVC format image data to the HDD 42.

  In step S57, the HDD 42 records the H.264 / AVC format image data generated in step S56, and the process ends.

  As described above, the image data recorded in the HDD 35 is once converted into a composite signal, signal processing is applied to the composite signal, and an image is encoded from the signal-processed composite signal to generate image data. The In this case, for the signal processing and encoding processing for the composite signal, processing with a large amount of processing but a higher performance is employed.

  Since the processing for the image data recorded on the HDD 35 is sequentially performed on the image data, even if a processing with a large processing amount is adopted, the overall processing amount does not increase so much.

  As described above, a plurality of images can be recorded simultaneously without degrading the image quality and without significantly increasing the circuit scale or the processing amount.

  In particular, as the number of systems for generating image data to be recorded on the HDD 35 increases, the circuit scale or the processing amount as a whole can be reduced as compared with the conventional system, and thus the recording apparatus can be realized at a lower cost. be able to.

  As described above, when an image is encoded and image data obtained by the encoding is recorded, the image can be recorded. In addition, the moving image is encoded into first image data of the first method, the first image data is recorded, the recorded first image data is converted into a composite signal, and a predetermined signal is converted into the composite signal. When the processing is applied and the moving image is encoded into the second image data of the second method based on the composite signal to which the signal processing is applied, the image quality is not deteriorated, A plurality of images can be recorded simultaneously without enlarging the circuit scale or the processing amount.

  The first moving image is encoded to the first image data of the first method, the second moving image is encoded to the second image data of the first method, and the first image data and the second image are encoded. Data is recorded, and based on the recorded first image data or second image data, the first moving image or the second moving image is encoded into the third image data of the second method. In this case, a plurality of images can be recorded at the same time without degrading the image quality and without significantly increasing the circuit scale or the processing amount.

  FIG. 6 is a block diagram showing an example of the configuration of a personal computer that executes the above-described series of processing by a program. A CPU (Central Processing Unit) 101 executes various processes according to a program stored in a ROM (Read Only Memory) 102 or a storage unit 108. A RAM (Random Access Memory) 103 appropriately stores programs executed by the CPU 101 and data. These CPU 101, ROM 102, and RAM 103 are connected to each other by a bus 104.

  As the CPU 101, the Cell described in “Birth of Cell”, Nikkei Electronics, Nikkei BP, February 28, 2005, pages 89 to 117 can be employed.

  An input / output interface 105 is also connected to the CPU 101 via the bus 104. Connected to the input / output interface 105 are an input unit 106 made up of a keyboard, mouse, microphone, and the like, and an output unit 107 made up of a display, speakers, and the like. The CPU 101 executes various processes in response to commands input from the input unit 106. Then, the CPU 101 outputs the processing result to the output unit 107.

  The storage unit 108 connected to the input / output interface 105 includes, for example, a hard disk, and stores programs executed by the CPU 101 and various data. The communication unit 109 communicates with an external device via a network such as the Internet or a local area network.

  A program may be acquired via the communication unit 109 and stored in the storage unit 108.

  The drive 110 connected to the input / output interface 105 drives a removable medium 111 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, and drives programs and data recorded there. Get etc. The acquired program and data are transferred to and stored in the storage unit 108 as necessary.

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software executes various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a program recording medium in a general-purpose personal computer or the like.

  As shown in FIG. 6, a program recording medium for storing a program that is installed in a computer and is ready to be executed by the computer includes a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only). Memory), DVD (including Digital Versatile Disc), magneto-optical disk), or removable media 111 which is a package medium made of semiconductor memory, or ROM 102 in which a program is temporarily or permanently stored, The storage unit 108 is configured by a hard disk or the like. The program is stored in the program recording medium using a wired or wireless communication medium such as a local area network, the Internet, or digital satellite broadcasting via a communication unit 109 that is an interface such as a router or a modem as necessary. Done.

  In the present specification, the step of describing the program stored in the program recording medium is not limited to the processing performed in time series in the order described, but is not necessarily performed in time series. Or the process performed separately is also included.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

It is a block diagram which shows the structure of the conventional HDD recorder. 1 is a block diagram illustrating a configuration of a recording apparatus according to an embodiment of the present invention. It is a flowchart explaining the process of recording. It is a flowchart explaining the detail of the process of a 1st step recording. It is a flowchart explaining the detail of the process of a 2nd step recording. And FIG. 11 is a block diagram illustrating an example of a configuration of a personal computer.

Explanation of symbols

  31-1 and 31-2 tuners, 32-1 to 32-4 one-dimensional Y / C separation unit, 33-1 to 33-4 chroma decoder, 34-1 to 34-4 DV encoder, 35 HDD, 36-1 And 36-2 ghost reference signal encoding unit, 39 conversion unit, 40 signal processing unit, 41 AVC encoder, 42 HDD, 51 DV decoder, 52 Y / C composite unit, 53 ghost reference signal decoding unit, 54 ghost reducer, 55 3D Y / C separation unit, 56 chroma decoder, 101 CPU, 102 ROM, 103 RAM, 108 storage unit, 111 removable media

Claims (9)

First encoding means for encoding a moving image into DV (Digital Video) first image data;
First recording means for recording the first image data;
Conversion means for converting the recorded first image data into a composite signal;
Signal processing means for applying predetermined signal processing to the composite signal;
Based on the composite signal to which the signal processing is applied, the moving image is converted into an H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) method . Second encoding means for encoding the second image data ,
The signal processing means is a recording apparatus that applies the signal processing for attenuating a ghost component to the composite signal . The recording apparatus according to claim 1, wherein the signal processing unit applies the signal processing for separating the luminance signal and the color signal in three dimensions into the composite signal. Encode a moving image into DV (Digital Video) format first image data,
Controlling the recording of the first image data;
Converting the recorded first image data into a composite signal;
Apply predetermined signal processing to the composite signal,
Based on the composite signal to which the signal processing is applied, the moving image is converted into an H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) method . Encoding into two image data ,
A recording method in which the signal processing for attenuating a ghost component as the predetermined signal processing is applied to the composite signal . Encode a moving image into DV (Digital Video) format first image data,
Controlling the recording of the first image data;
Converting the recorded first image data into a composite signal;
Apply predetermined signal processing to the composite signal,
Based on the composite signal to which the signal processing is applied, the moving image is converted into an H.264 / AVC (ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding) method . Causing the computer to execute the step of encoding into the image data of 2 ;
A program in which the signal processing for attenuating a ghost component as the predetermined signal processing is applied to the composite signal . First encoding means for encoding the first moving image into the first image data of the DV system ;
Second encoding means for encoding a second moving image into the second image data of the DV system ;
First recording means for recording the first image data and the second image data;
Conversion means for converting the recorded first image data or the second image data into a composite signal;
Signal processing means for applying predetermined signal processing to the composite signal;
Based on the recorded first image data or the second image data, the first moving image or the second moving image is encoded into H.264 / AVC format third image data. And a third encoding means .
The third encoding means uses the composite signal to which the signal processing is applied,
Encoding the first moving image or the second moving image into the third image data;
The signal processing means is a recording apparatus that applies the signal processing for attenuating a ghost component to the composite signal . The recording apparatus according to claim 5 , wherein the signal processing unit applies the signal processing for separating the luminance signal and the color signal in three dimensions into the composite signal. The recording apparatus according to claim 5 , further comprising second recording means for recording the third image data. Encoding the first moving image into the first image data of the first method;
A second moving image is encoded into the second image data of the first scheme;
Controlling the recording of the first image data and the second image data;
Converting the recorded first image data or the second image data into a composite signal;
Apply predetermined signal processing to the composite signal,
Based on the recorded first image data or the second image data, the first moving image or the second moving image is encoded into H.264 / AVC format third image data. Including the steps of
The first moving image or the second moving image is encoded into the third image data by the composite signal to which the signal processing is applied,
A recording method in which the signal processing for attenuating a ghost component is applied to the composite signal as the predetermined signal processing . Encoding the first moving image into the first image data of the first method;
A second moving image is encoded into the second image data of the first scheme;
Controlling the recording of the first image data and the second image data;
Converting the recorded first image data or the second image data into a composite signal;
Apply predetermined signal processing to the composite signal,
Based on the recorded first image data or the second image data, the first moving image or the second moving image is encoded into H.264 / AVC format third image data. Make the computer execute the steps
The first moving image or the second moving image is encoded into the third image data by the composite signal to which the signal processing is applied,
A program in which the signal processing for attenuating a ghost component is applied to the composite signal as the predetermined signal processing .

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