US20050047501A1 - Transcoder and imaging apparatus for converting an encoding system of video signal - Google Patents

Transcoder and imaging apparatus for converting an encoding system of video signal Download PDF

Info

Publication number
US20050047501A1
US20050047501A1 US10/768,757 US76875704A US2005047501A1 US 20050047501 A1 US20050047501 A1 US 20050047501A1 US 76875704 A US76875704 A US 76875704A US 2005047501 A1 US2005047501 A1 US 2005047501A1
Authority
US
United States
Prior art keywords
image signal
pictures
picture
transcoder
compressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/768,757
Other languages
English (en)
Inventor
Daisuke Yoshida
Hironori Komi
Yusuke Yatabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Assigned to HITACHI, LTD. reassignment HITACHI, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOMI, HIRONORI, YATABE, YUSUKE, YOSHIDA, DAISUKE
Publication of US20050047501A1 publication Critical patent/US20050047501A1/en
Priority to US12/839,540 priority Critical patent/US8355439B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/162—User input
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/577—Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/587—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums

Definitions

  • the present invention relates to a transcoder for converting the coding format of an image signal and to an imaging apparatus and signal processor using this transcoder.
  • MPEG2-Video (ISO/IEC13818-2) is used for recording to and playing back from DVDs.
  • MPEG4-Video ISO/IEC14496-2 is used in radio communication and Internet applications. Including them, a variety of encoding methods have been proposed. With the diversification of encoding methods, however, it has become necessary to transcode data among these formats and improve the transcoding capability. In particular, if the time required for the transcoding process is reduced, the user side is given raised convenience.
  • a technique disclosed in Japanese Patent Laid-open No. 2002-152755 concerns improvement in the transcoding speed.
  • This technique “reduces the temporal resolution of an input video stream by thinning out bidirectional predictive frames and reduces the spatial resolution by reducing the picture size of the temporal resolution-lowered video stream without inversely transforming transform coefficients” aimed at “shortening the transcoding time required to convert the video data to a different kind of video data by entirely eliminating the necessity of inverse transformation of coded transform coefficients in the frequency domain”.
  • the transcoding time can be reduced by eliminating the decoding process (i.e., inverse transformation of transform coefficients).
  • a transcoder as to be configured to include a decoder for decoding an MPEG stream for display as an image signal, combined with an encoder for encoding/compressing the input image signal into an MPEG stream, eliminating the inverse transformation of transform coefficients does not substantially reduce the time required for transcoding if transcoding is made at a rate of one picture per frame period.
  • a transcoder which inputs a first image signal encoded by a first compressing and encoding method and transcodes the first image signal to a second image signal encoded by a second compressing and encoding method.
  • the transcoder comprises: a picture selector which generates a subset image signal of the first image signal by extracting pictures of one ore more specific types in frames or fields from the first image signal; a first decoder which decodes the subset image signal generated by the picture selector; and a first encoder which encodes the decoded image signal by a second compressing and encoding method.
  • the picture selector uses the extracted pictures to generate the subset image signal with a shorter effective length.
  • a transcoder which reads out a first image signal encoded by a first compressing and encoding method from a recoding medium and transcodes the first image signal to a second image signal encoded by a second compressing and encoding method.
  • the transcoder comprises: an interface section which generates a subset image signal of the first image signal by extracting pictures of one or more specific types in frames or fields from the first image signal; a first decoder which decodes the subset image signal generated by the interface section; and a first encoder which encodes the decoded image signal by a second compressing and encoding method.
  • the interface section uses the extracted pictures to generate the subset image signal with a reduced effective length.
  • FIG. 1 is a block diagram of a transcoder, according to a first embodiment of the present invention
  • FIG. 2 shows a configuration of the picture selector in FIG. 1 ;
  • FIG. 3 is a imaginary diagram showing an example of a picture selecting scheme in FIG. 1 ;
  • FIG. 4 is a diagram showing a preferable picture extracting condition in FIG. 1 ;
  • FIG. 5 is a block diagram of another transcoder according to a second embodiment of the present invention.
  • FIG. 6 shows an example of a file configuration on a recording medium 1 in FIG. 5 ;
  • FIG. 7 is a block diagram of an imaging apparatus according to a third embodiment of the present invention.
  • FIG. 1 shows a block diagram of a transcoder according to a first embodiment of the present invention.
  • a stream read out from a recording medium 1 , is transcoded by a transcoder 3 and output from an output terminal 50 .
  • the transcoder 3 comprises a picture selector 4 , an MPEG2 decoder 5 , a frame memory 6 and an MPEG4 encoder 7 .
  • the signal accumulated in the frame memory 6 is displayed by a display 9 via a display circuit 8 .
  • a MP@ML (main profile at main level) MPEG2 stream (hereafter denoted simply as an MPEG2/MP@ML stream) is transcoded to a SP (simple profile) MPEG4 stream (hereafter denoted simply as an MPEG4/SP stream) and output.
  • MP@ML main profile at main level
  • SP simple profile MPEG4 stream
  • a 30 frames/sec MPEG2/MP@ML stream is transcoded to a 10 frames/sec MPEG4/SP stream.
  • an MPEG2 stream stored on the recording medium 1 such as a DVD is read out by an interface 2 and supplied to the picture selector 4 .
  • the picture selector 4 searches the incoming MPEG2 stream for picture headers and extracts pictures of a specific kind in frames or fields so as to generate an MPEG2 stream whose picture population is reduced to a third. How the picture selector 4 is configured will be described later in detail.
  • the MPEG2 stream after given extraction processing, is output and supplied from the picture selector 4 to the MPEG2 decoder 5 .
  • the MPEG2 decoder 5 converts the input MPEG stream to a digital video signal containing pixel value data by decoding the input MPEG stream. Pixel value data is accumulated in the frame memory and, according to a display sync signal, read out to the display section for output on the display 9 . Concurrently, the digital video signal is supplied from the frame memory 6 to the MPEG4 encoder 7 which in turn encodes the signal to an MPEG4 stream and outputs it to the output terminal 51 .
  • FIG. 2 shows a configuration of the picture selector 4 in FIG. 1 .
  • the picture selector 4 has a separator 41 , a buffer memory 42 and a buffer memory readout circuit 43 .
  • the MPEG2 stream has audio, video and additional data and others multiplexed thereinto.
  • the separator 41 generates ESs (Elementary Streams) by separating the MPEG2 stream according to data type and performing system decode.
  • a video ES is accumulated in the buffer memory 42 .
  • the buffer memory readout circuit 43 sequentially searches the buffer memory 42 to detect each picture head and determines the type of the associated picture. If a determined picture type is the type of pictures to be extracted, data is read out until just before the next picture head. Extraction of pictures of specific picture types is realized through this procedure.
  • FIG. 3 is an imaginary diagram showing an example of how pictures are selected in the present embodiment.
  • the MPEG2 stream comprises three types of pictures: I-pictures coded within frames, P-pictures predicted and coded with reference to past frames and B-pictures predicted and coded with reference to both past and future frames.
  • FIG. 3A shows a video ES 300 stored in the buffer memory 32 .
  • a video ES 301 shown in FIG. 3B is a result of the video ES 300 read out from the buffer memory 42 and given picture selection by the readout circuit 43 . Of the input video ES, only I-pictures and P pictures are extracted whereas B-pictures are removed. If the video ES 300 has a picture sequence ⁇ IBBPBBPBBPBBPBBIBB . . . >, the video ES 301 has a picture sequence ⁇ IPPPPPI . . . >.
  • the buffer memory readout circuit 43 detects a picture header 302 in the video ES 300 , judges that the picture is a I-picture which is to be extracted, and starts reading out data. Then, the readout circuit 43 detects the next picture header 303 , judges that the picture is a B-picture which is to be removed, and stops reading out data just before the picture header 303 . The readout circuit 43 resumes header search and detects picture headers 304 and 305 . The readout circuit 43 detects that the picture following the picture header 305 is a P-picture which is to be extracted, and starts reading out data. By repeating this procedure, only I-pictures and P-pictures are extracted from the video ES 300 to generate the video ES 301 .
  • the video ES 301 is configured in such a manner that I-picture data is immediately followed by the subsequently extracted P-picture data. Therefore, as a subset of the video ES signal 300 , the video ES 301 is shorter than the video ES 300 . Note that although not shown in the figure, the subset video signal may also be arranged so as to contain a space for each non-extracted B-picture. This does not change the effective length since the spaces can be skipped in the subsequent signal processing (decoding).
  • the MPEG2 decoder decodes the supplied MPEG2 stream and stores it in the frame memory 6 so that the decoded video signal may be displayed. The stored video signal is retained until displayed.
  • the decoding speed In order to prevent the frame memory from overflowing or underflowing, the decoding speed must be equal to the display speed. Accordingly, increasing the total number of pictures increases the number of pictures to be displayed. The time required for recording becomes longer in proportion to the total number of pictures.
  • the video ES 300 is to be transcoded in a conventional method.
  • B-pictures are removed to supply a stream ⁇ IPPPPI . . . > to the MPEG4 encoder 7 for encoding.
  • the time required for transcoding equals the time required to decode and display the non-thinned out video ES 300 which contains all pictures.
  • the above-mentioned transcoding is performed after a video ES 301 , a subset of the video signal ES 300 , is generated by removing B-pictures from the video ES 300 .
  • the MPEG decoder 5 decodes the video ES 301 , that is, only the pictures ⁇ IPPPPI . . . > and directly supplies the decoded video signal to the MPEG4 encoder.
  • the total number of pictures contained in the video ES 301 is reduced to a third by the picture extraction circuit 4 as compared with the total number of pictures contained in the video ES 300 .
  • the transcoding time can be reduced remarkably.
  • pictures are displayed at the triple speed via the display unit 8 as compared with the display speed taken when the stream is played back without removing pictures.
  • FIGS. 4A to 4 C show a preferable picture extracting condition which can be employed in the picture selector 4 .
  • reference is required between pictures for inter-picture motion compensation.
  • a pre-extraction stream as shown in FIG. 4A , for example, a B-picture 102 , is predicted and coded with reference to a P-picture 101 and a P-picture 103 .
  • FIGS. 4B and 4C are examples of streams derived as results of extraction by the picture selector 4 .
  • the I-pictures and P-pictures are extracted whereas the B-pictures are removed. This is one of the preferable extracting schemes since each extracted P-picture can refer to other extracted pictures.
  • extracting only I-pictures from a video stream comprising I-, P- and B-pictures extracting I-pictures from a video stream comprising I- and P-pictures and extracting specific I-pictures from a video stream comprising I-pictures are also applicable. Further, such a configuration is possible as to allow the user to specify what pictures are to be extracted.
  • the aforementioned embodiment is also characterized by the processing speed of the picture selector 4 .
  • the processing speed of the picture selector 4 As described earlier, when the stream (video ES) 300 in FIG. 3A is thinned to the stream 301 in FIG. 3B , the total number of pictures contained in the stream reduces to a third. Because of this reduced number of pictures, the time required for the subsequent decoding can be shortened. For the picture selector 4 to perform extraction and removal without delay, however, data must be supplied to the picture selector 4 at a higher rate than the decoding rate. In the above-mentioned case where B-pictures are removed from a stream having a picture sequence ⁇ IBBPBBPBBPBBPBBI . . . > to generate a stream ⁇ IPPPPI . . .
  • the stream must be supplied to the picture selector 4 at a bit rate three times as fast as the decoding bit rate if the I-, P- and B-pictures has the same amount of code per picture. Otherwise it is not possible for the picture selector 4 to perform extraction and removal without delay. Generally, however, since I-pictures have the largest amount of code, followed by P-pictures and then B-pictures, the stream supply bit rate must not be three times as fast as the decoding bit rate. Since it is specified that an MPEG2/MP@ML may have a bit rate of up to 15 Mbits/sec, it is sufficient to supply the stream to the picture selector 4 at 45 Mbits/sec, three times as fast as the maximum bit rate.
  • the recording medium 1 is a DVD-ROM.
  • data can be input to the picture selector 4 via the interface section 2 at a bit rate of up to 160 Mbits/sec, it is possible to supply MPEG2 stream data to the picture selector 4 at a sufficiently high bit rate.
  • the readout circuit 43 can perform header search processing at a maximum bit rate of about 1 Gbits/sec if it operates in 16 bits at 81 MHz, the readout circuit 43 can easily afford to perform header search processing on the data which is input at the above-mentioned bit rate.
  • the same header search processing can also be implemented by software. For example, if the CPU operates at 200 MHz and 30 cycles are spent to process each word, header search processing can be executed at a maximum bit rate of 106 Mbits/sec, which is sufficiently high for the input bit rate.
  • FIG. 5 shows a block diagram of another transcoder according to a second embodiment of the present invention.
  • This embodiment differs from the first embodiment ( FIG. 1 ) in that to extract and remove pictures from a stream which is read out from a recording medium 1 , an interface 2 is used instead of the picture selector 4 of the first embodiment. On the recording medium 1 , a stream entered from an input terminal 51 is stored via the interface 2 .
  • a management information file is stored together with an MPEG2 stream.
  • a management information file is created by the interface 2 when a stream file, entered from the input terminal 51 , is to be stored on the recording medium 1 .
  • the picture type, storage location and size of each picture are recorded.
  • the interface 2 identifies the locations of the respective pictures to be extracted. Accordingly the interface 2 extracts these pictures from the stream and supplies them to an MPEG2 decoder 5 where transcoding is done by the same process as in the first embodiment.
  • FIG. 6 shows the file configuration prescribed in the DVD Video Recording specification.
  • the DVD_RTAV directory 200 exists with the hierarchically lower VR_MANGR.IFO file 201 and VR_MOVIE.VRO file 202 .
  • VR_MOVIE.VRO 201 stores MPEG2 stream data which is divided into small units called VOBUs (Video Object Units). Each VOBU has one I-picture.
  • VR_MANGR.IFO 202 is a management information file where the location and size of the I-picture in each VOBU are recorded in the form of a table for use in fast forward, backward and other special play modes.
  • the interface block 2 can refer to VR_MANGR.IFO 201 to recognize the location and size of each I-picture.
  • Each I-picture can be extracted by reading out as large data from the recognized location as the recognized picture size.
  • the video signal is downscaled to a subset in the stage of extraction/readout from the recording medium 1 , the time required for the subsequent processing can be shortened.
  • the recoding medium conforms to the DVD Video Recording specifications
  • this embodiment is also similarly applicable to other recording media if management information indicating the type and location of each picture is recorded thereon.
  • this embodiment may also be provided with such a function as to analyze the stored stream read out by the interface block 2 and create a management information file for storage on the recording medium.
  • FIG. 7 is a block diagram of an imaging apparatus according to a third embodiment of the present invention.
  • This embodiment is an imaging apparatus where the transcoder shown in FIG. 1 as the first embodiment is used.
  • this imaging apparatus 30 comprises a camera unit 10 and a user interface 20 .
  • the camera unit 10 is composed of an image pickup block 11 and an MPEG2 encoder 12 .
  • the user interface 20 issues a recording instruction to start the image pickup block 11 in the camera unit 10 generating a digital video signal.
  • the MPEG2 encoder 12 generates an MPEG2 stream by encoding the digital video signal. Then, the MPEG2 stream is recorded on the recording medium 1 via the interface 2 .
  • the user interface 20 issues a transcode instruction.
  • the same transcoding process as in the first embodiment is started by this instruction to output an MPEG4 stream.
  • this imaging apparatus described as the third embodiment it is possible not only to pick up images and record them as a high image quality MPEG2 stream but also to convert it to a low bit rate MPEG4 stream for output to the outside.
  • the imaging apparatus in FIG. 7 uses the transcoder shown in FIG. 1 as the first embodiment, it is also possible to configure the imaging apparatus by using the transcoder shown in FIG. 5 as the second embodiment.
  • the camera unit 10 has the image pickup block 11 therein, it is possible to modify the configuration in such a manner that a video signal receiver is connected in order to input video signals from the outside. It is also possible to modify the configuration so as to connect an MPEG2 stream receiver in order to input MPEG2 streams from the outside.
  • a transcoder can be applied not only to such an imaging apparatus as mentioned above but also to such apparatus as a receiver (set-top box) which receives a video signal (stream) and transcodes it before outputting it to a display, an image output apparatus (display) which transcodes an input image signal before displaying it, an image recording apparatus which transcodes an input image signal before recoding it onto a recording medium (hard disk, optical disk or the like) and a home server which is connected to various image apparatus to supply image signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Signal Processing For Recording (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
US10/768,757 2003-08-12 2004-01-30 Transcoder and imaging apparatus for converting an encoding system of video signal Abandoned US20050047501A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/839,540 US8355439B2 (en) 2003-08-12 2010-07-20 Transcoder and imaging apparatus for converting an encoding system of video signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003207246A JP4403737B2 (ja) 2003-08-12 2003-08-12 信号処理装置及びこれを用いた撮像装置
JP2003-207246 2003-08-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/839,540 Continuation US8355439B2 (en) 2003-08-12 2010-07-20 Transcoder and imaging apparatus for converting an encoding system of video signal

Publications (1)

Publication Number Publication Date
US20050047501A1 true US20050047501A1 (en) 2005-03-03

Family

ID=34208954

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/768,757 Abandoned US20050047501A1 (en) 2003-08-12 2004-01-30 Transcoder and imaging apparatus for converting an encoding system of video signal
US12/839,540 Expired - Fee Related US8355439B2 (en) 2003-08-12 2010-07-20 Transcoder and imaging apparatus for converting an encoding system of video signal

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/839,540 Expired - Fee Related US8355439B2 (en) 2003-08-12 2010-07-20 Transcoder and imaging apparatus for converting an encoding system of video signal

Country Status (3)

Country Link
US (2) US20050047501A1 (ja)
JP (1) JP4403737B2 (ja)
CN (1) CN1295932C (ja)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708198A1 (en) * 2005-03-28 2006-10-04 Pioneer Corporation Encoded video conversion apparatus, conversion method and program product
US20080145021A1 (en) * 2006-12-18 2008-06-19 Satoru Takashimizu Apparatus for video recording and reproducing, and method for trick play of video
US20080278595A1 (en) * 2007-05-11 2008-11-13 Advance Micro Devices, Inc. Video Data Capture and Streaming
US20090016430A1 (en) * 2007-05-11 2009-01-15 Advance Micro Devices, Inc. Software Video Encoder with GPU Acceleration
US20090060032A1 (en) * 2007-05-11 2009-03-05 Advanced Micro Devices, Inc. Software Video Transcoder with GPU Acceleration
US20110093900A1 (en) * 2009-10-20 2011-04-21 Vipul Patel Gateway apparatus and methods for digital content delivery in a network
US20110216162A1 (en) * 2010-01-05 2011-09-08 Dolby Laboratories Licensing Corporation Multi-View Video Format Control
US20130163675A1 (en) * 2010-09-07 2013-06-27 Shenzhen Institues Of Advanced Technology Chinese Academy Of Sciences Multi-media slicing and transcoding system and storage medium and method thereof
US8978079B2 (en) 2012-03-23 2015-03-10 Time Warner Cable Enterprises Llc Apparatus and methods for managing delivery of content in a network with limited bandwidth using pre-caching
US9398346B2 (en) 2007-05-04 2016-07-19 Time Warner Cable Enterprises Llc Methods and apparatus for predictive capacity allocation
US9602414B2 (en) 2011-02-09 2017-03-21 Time Warner Cable Enterprises Llc Apparatus and methods for controlled bandwidth reclamation
US9961413B2 (en) 2010-07-22 2018-05-01 Time Warner Cable Enterprises Llc Apparatus and methods for packetized content delivery over a bandwidth efficient network
US10057609B2 (en) 2008-01-30 2018-08-21 Time Warner Cable Enterprises Llc Methods and apparatus for predictive delivery of content over a network
US10116676B2 (en) 2015-02-13 2018-10-30 Time Warner Cable Enterprises Llc Apparatus and methods for data collection, analysis and service modification based on online activity
US10178435B1 (en) 2009-10-20 2019-01-08 Time Warner Cable Enterprises Llc Methods and apparatus for enabling media functionality in a content delivery network
US10250932B2 (en) 2012-04-04 2019-04-02 Time Warner Cable Enterprises Llc Apparatus and methods for automated highlight reel creation in a content delivery network
US10313755B2 (en) 2009-03-30 2019-06-04 Time Warner Cable Enterprises Llc Recommendation engine apparatus and methods
US11076189B2 (en) 2009-03-30 2021-07-27 Time Warner Cable Enterprises Llc Personal media channel apparatus and methods
US11159851B2 (en) 2012-09-14 2021-10-26 Time Warner Cable Enterprises Llc Apparatus and methods for providing enhanced or interactive features

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4534935B2 (ja) * 2005-10-04 2010-09-01 株式会社日立製作所 トランスコーダ、記録装置及びトランスコード方法
JP4600997B2 (ja) * 2005-11-08 2010-12-22 Ｋｄｄｉ株式会社 符号化方式変換装置
FR2908949A1 (fr) * 2006-11-16 2008-05-23 Thomson Licensing Sas Procede de transcodage de donnees du standard mpeg2 a un standard mpeg4.
WO2009119721A1 (ja) * 2008-03-26 2009-10-01 日本電気株式会社 映像トランスコーダ監視装置、その方法及びその監視プログラム
JPWO2009119807A1 (ja) * 2008-03-28 2011-07-28 日本電気株式会社 映像トランスコーダ監視装置、その方法及びそのプログラム

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020106024A1 (en) * 2000-11-10 2002-08-08 Kazushi Sato Image information conversion apparatus and image information conversion method
US20020181588A1 (en) * 2001-05-31 2002-12-05 Sanyo Electric Co., Ltd. Image processing employing picture type conversion
US20020194589A1 (en) * 2001-05-08 2002-12-19 Cristofalo Michael Technique for optimizing the delivery of advertisements and other programming segments by making bandwidth tradeoffs
US20030001964A1 (en) * 2001-06-29 2003-01-02 Koichi Masukura Method of converting format of encoded video data and apparatus therefor
US20030215018A1 (en) * 2002-05-14 2003-11-20 Macinnis Alexander G. System and method for transcoding entropy-coded bitstreams
US20040073536A1 (en) * 1999-11-30 2004-04-15 Charles Smith-Semedo System and method for computer-assisted manual and automatic logging of time-based media
US20040218671A1 (en) * 2000-03-15 2004-11-04 Shinya Haraguchi Picture information conversion method and apparatus
US7173947B1 (en) * 2001-11-28 2007-02-06 Cisco Technology, Inc. Methods and apparatus to evaluate statistical remultiplexer performance

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1223768A (zh) * 1996-08-21 1999-07-21 株式会社日立制作所 带有液晶显示的电子摄像机
JP2000244872A (ja) 1999-02-19 2000-09-08 Toshiba Corp トランスコーダ装置
JP3789048B2 (ja) 1999-02-22 2006-06-21 株式会社東芝 動画像再符号化装置
US7088725B1 (en) * 1999-06-30 2006-08-08 Sony Corporation Method and apparatus for transcoding, and medium
JP4153150B2 (ja) 1999-09-10 2008-09-17 株式会社エヌ・ティ・ティ・ドコモ 動画像符号化データのトランスコーディング方法およびトランスコーディング装置
JP2001285823A (ja) 2000-03-30 2001-10-12 Toshiba Corp 映像再生配信方法および映像再生配信装置
US6647061B1 (en) * 2000-06-09 2003-11-11 General Instrument Corporation Video size conversion and transcoding from MPEG-2 to MPEG-4
WO2002035852A1 (en) * 2000-10-24 2002-05-02 Koninklijke Philips Electronics N.V. Method of transcoding and transcoding device with embedded filters
JP2002152755A (ja) * 2000-11-09 2002-05-24 Nippon Telegr & Teleph Corp <Ntt> 映像ストリーム間のトランスコード方法、およびトランスコーダ、並びにトランスコード方法のプログラムを記録した記録媒体
JP2003087797A (ja) * 2001-09-06 2003-03-20 Sony Corp 画像情報変換装置及び方法、画像情報変換プログラム、並びに記録媒体

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040073536A1 (en) * 1999-11-30 2004-04-15 Charles Smith-Semedo System and method for computer-assisted manual and automatic logging of time-based media
US20040218671A1 (en) * 2000-03-15 2004-11-04 Shinya Haraguchi Picture information conversion method and apparatus
US20020106024A1 (en) * 2000-11-10 2002-08-08 Kazushi Sato Image information conversion apparatus and image information conversion method
US20020194589A1 (en) * 2001-05-08 2002-12-19 Cristofalo Michael Technique for optimizing the delivery of advertisements and other programming segments by making bandwidth tradeoffs
US20020181588A1 (en) * 2001-05-31 2002-12-05 Sanyo Electric Co., Ltd. Image processing employing picture type conversion
US20030001964A1 (en) * 2001-06-29 2003-01-02 Koichi Masukura Method of converting format of encoded video data and apparatus therefor
US7173947B1 (en) * 2001-11-28 2007-02-06 Cisco Technology, Inc. Methods and apparatus to evaluate statistical remultiplexer performance
US20030215018A1 (en) * 2002-05-14 2003-11-20 Macinnis Alexander G. System and method for transcoding entropy-coded bitstreams

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1708198A1 (en) * 2005-03-28 2006-10-04 Pioneer Corporation Encoded video conversion apparatus, conversion method and program product
US20060233516A1 (en) * 2005-03-28 2006-10-19 Pioneer Corporation Encoded video conversion apparatus, conversion method and program product
US20080145021A1 (en) * 2006-12-18 2008-06-19 Satoru Takashimizu Apparatus for video recording and reproducing, and method for trick play of video
US8571392B2 (en) 2006-12-18 2013-10-29 Hitachi Consumer Electronics Co., Ltd. Apparatus for video recording and reproducing, and method for trick play of video
US10911313B2 (en) 2007-05-04 2021-02-02 Time Warner Cable Enterprises Llc Methods and apparatus for predictive capacity allocation
US9398346B2 (en) 2007-05-04 2016-07-19 Time Warner Cable Enterprises Llc Methods and apparatus for predictive capacity allocation
US20120243601A1 (en) * 2007-05-11 2012-09-27 Advanced Micro Devices, Inc. Software video transcoder with gpu acceleration
US8861591B2 (en) 2007-05-11 2014-10-14 Advanced Micro Devices, Inc. Software video encoder with GPU acceleration
US8233527B2 (en) * 2007-05-11 2012-07-31 Advanced Micro Devices, Inc. Software video transcoder with GPU acceleration
US20080278595A1 (en) * 2007-05-11 2008-11-13 Advance Micro Devices, Inc. Video Data Capture and Streaming
US20090016430A1 (en) * 2007-05-11 2009-01-15 Advance Micro Devices, Inc. Software Video Encoder with GPU Acceleration
US20090060032A1 (en) * 2007-05-11 2009-03-05 Advanced Micro Devices, Inc. Software Video Transcoder with GPU Acceleration
US8731046B2 (en) * 2007-05-11 2014-05-20 Advanced Micro Devices, Inc. Software video transcoder with GPU acceleration
US10057609B2 (en) 2008-01-30 2018-08-21 Time Warner Cable Enterprises Llc Methods and apparatus for predictive delivery of content over a network
US11039185B2 (en) 2008-01-30 2021-06-15 Time Warner Cable Enterprises Llc Methods and apparatus for predictive delivery of content over a network
CN102273205B (zh) * 2008-11-04 2016-11-16 先进微装置公司 以gpu加速的软件视频转码器
US11659224B2 (en) 2009-03-30 2023-05-23 Time Warner Cable Enterprises Llc Personal media channel apparatus and methods
US11012749B2 (en) 2009-03-30 2021-05-18 Time Warner Cable Enterprises Llc Recommendation engine apparatus and methods
US10313755B2 (en) 2009-03-30 2019-06-04 Time Warner Cable Enterprises Llc Recommendation engine apparatus and methods
US11076189B2 (en) 2009-03-30 2021-07-27 Time Warner Cable Enterprises Llc Personal media channel apparatus and methods
US20110093900A1 (en) * 2009-10-20 2011-04-21 Vipul Patel Gateway apparatus and methods for digital content delivery in a network
US10178435B1 (en) 2009-10-20 2019-01-08 Time Warner Cable Enterprises Llc Methods and apparatus for enabling media functionality in a content delivery network
US9027062B2 (en) * 2009-10-20 2015-05-05 Time Warner Cable Enterprises Llc Gateway apparatus and methods for digital content delivery in a network
US8743178B2 (en) * 2010-01-05 2014-06-03 Dolby Laboratories Licensing Corporation Multi-view video format control
US20110216162A1 (en) * 2010-01-05 2011-09-08 Dolby Laboratories Licensing Corporation Multi-View Video Format Control
US9961413B2 (en) 2010-07-22 2018-05-01 Time Warner Cable Enterprises Llc Apparatus and methods for packetized content delivery over a bandwidth efficient network
US10448117B2 (en) 2010-07-22 2019-10-15 Time Warner Cable Enterprises Llc Apparatus and methods for packetized content delivery over a bandwidth-efficient network
US20130163675A1 (en) * 2010-09-07 2013-06-27 Shenzhen Institues Of Advanced Technology Chinese Academy Of Sciences Multi-media slicing and transcoding system and storage medium and method thereof
US9031135B2 (en) * 2010-09-07 2015-05-12 Shenzhen Institutes Of Advanced Technology Chinese Academy Of Sciences Multi-media slicing and transcoding system and storage medium and method thereof
US9602414B2 (en) 2011-02-09 2017-03-21 Time Warner Cable Enterprises Llc Apparatus and methods for controlled bandwidth reclamation
US8978079B2 (en) 2012-03-23 2015-03-10 Time Warner Cable Enterprises Llc Apparatus and methods for managing delivery of content in a network with limited bandwidth using pre-caching
US10667019B2 (en) 2012-03-23 2020-05-26 Time Warner Cable Enterprises Llc Apparatus and methods for managing delivery of content in a network with limited bandwidth using pre-caching
US10171885B2 (en) 2012-03-23 2019-01-01 Time Warner Cable Enterprises Llc Apparatus and methods for managing delivery of content in a network with limited bandwidth using pre-caching
US10250932B2 (en) 2012-04-04 2019-04-02 Time Warner Cable Enterprises Llc Apparatus and methods for automated highlight reel creation in a content delivery network
US11109090B2 (en) 2012-04-04 2021-08-31 Time Warner Cable Enterprises Llc Apparatus and methods for automated highlight reel creation in a content delivery network
US11159851B2 (en) 2012-09-14 2021-10-26 Time Warner Cable Enterprises Llc Apparatus and methods for providing enhanced or interactive features
US11057408B2 (en) 2015-02-13 2021-07-06 Time Warner Cable Enterprises Llc Apparatus and methods for data collection, analysis and service modification based on online activity
US11606380B2 (en) 2015-02-13 2023-03-14 Time Warner Cable Enterprises Llc Apparatus and methods for data collection, analysis and service modification based on online activity
US10116676B2 (en) 2015-02-13 2018-10-30 Time Warner Cable Enterprises Llc Apparatus and methods for data collection, analysis and service modification based on online activity

Also Published As

Publication number Publication date
JP2005064569A (ja) 2005-03-10
US8355439B2 (en) 2013-01-15
JP4403737B2 (ja) 2010-01-27
US20100283869A1 (en) 2010-11-11
CN1295932C (zh) 2007-01-17
CN1581981A (zh) 2005-02-16

Similar Documents

Publication Publication Date Title
US8355439B2 (en) Transcoder and imaging apparatus for converting an encoding system of video signal
JP4769717B2 (ja) 画像復号化方法
KR101227330B1 (ko) 화상 부호화 장치 및 화상 복호화 장치
JP3181037B2 (ja) 符号化されたデータストリームにおける追加データの埋め込みおよび抽出方法
KR101240089B1 (ko) 화상 부호화 장치 및 화상 복호화 장치
US20030002583A1 (en) Transcoding of video data streams
JP3147792B2 (ja) 高速再生のためのビデオデータの復号化方法及びその装置
US20070058725A1 (en) Coding/decoding apparatus, coding/decoding method, coding/decoding integrated circuit and coding/decoding program
US7778526B2 (en) System and method for maintaining DVD-subpicture streams upon conversion to higher compressed data format
US6373905B1 (en) Decoding apparatus and decoding method
US20080063081A1 (en) Apparatus, method and program for encoding and/or decoding moving picture
JP3253530B2 (ja) 動画像記録装置
JP2000278643A (ja) データ変換装置
JP2006222931A (ja) 情報記録装置、情報再生装置、情報記録プログラムおよび情報再生プログラム
JP4289055B2 (ja) トランスコーダおよびこれを用いた記録再生装置
EP1926104A1 (en) Encoding device, decoding device, recording device, audio/video data transmission system
US7054370B2 (en) Apparatus and method of transcoding video snap image
KR100920697B1 (ko) 트랜지션 포인트 검출용 장치와 방법, 레코딩 장치 및레코드 재생 장치
JP3897783B2 (ja) 画像処理装置及びその制御方法、並びにコンピュータプログラム及びコンピュータ可読記憶媒体
JP4178521B2 (ja) 符号化映像信号の記録方法、及び映像信号符号化装置
JP2011091592A (ja) 画像符号化装置、符号変換装置、画像記録装置、画像再生装置、画像符号化方法及び、集積回路
JP2009272929A (ja) 映像符号化装置および映像符号化方法
JP2005237020A (ja) ディジタル映像処理装置及びディジタル映像処理方法
JPH0974557A (ja) デコーダおよびｍｐｅｇビデオデコーダ
JP2003209801A (ja) 動画像符号化装置および動画像記録再生装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: HITACHI, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YOSHIDA, DAISUKE;KOMI, HIRONORI;YATABE, YUSUKE;REEL/FRAME:015684/0883

Effective date: 20040224

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION