# US 9,438,924 B2 · Video encoding apparatus, video decoding apparatus, video encoding method, and video decoding method

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- Number: US 9,438,924 B2
- Document ID: US9438924B2
- Status: Granted
- Kind: B2
- Application number: 15/073,261
- Filed: 2016-03-17
- Published: 2016-07-07
- Granted: 2016-09-06
- Earliest claimed: 2012-07-02
- Assignees: Fujitsu Limited
- Applicants: Fujitsu Limited
- Inventors: Kimihiko Kazui; Satoshi Shimada; Junpei Koyama
- Web page: https://patentgrep.com/patent/US9438924B2

## CPC

- H04N 19/50: using predictive coding (H04N19/61 takes precedence)
- G11B 27/031: Electronic editing of digitised analogue information signals, e.g. audio or video signals
- H04N 19/132: Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/503: involving temporal prediction (adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109)
- H04N 19/68: involving the insertion of resynchronisation markers into the bitstream
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 21/23424: {involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement}
- H04N 21/44016: {involving splicing one content stream with another content stream, e.g. for substituting a video clip}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A video encoding apparatus appends decoding delay correction information and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order in the video data than a first picture that may potentially be spliced to a trailing end of other encoded video data have been discarded, the first picture and subsequent pictures in the encoded video data can be continuously decoded and displayed by a video decoding apparatus. The video decoding apparatus corrects the decoding delay and display delay of the first picture and its subsequent pictures by using the decoding delay correction information and display delay correction information.

## Claims

### Claim 1

A video encoding and decoding system comprising:
a video encoding apparatus for encoding video data by inter-frame predictive coding, including:
an encoding control unit which obtains, for a first picture included in the first video data, the first picture being encoded without referring to any other picture included in the first video data, decoding delay correction information for correcting decoding delay for each of the first picture and subsequent pictures in the first video data and display delay correction information for correcting display delay for each of the first picture and subsequent pictures in the first video data when the first picture and the subsequent pictures are spliced to a trailing end of second encoded video data after the first video data is encoded; and
a picture encoding unit which encodes each picture contained in the first video data and appends the decoding delay correction information and the display delay correction information to the first video data encoded, wherein
the decoding delay correction information includes a value corresponding to the number of pictures that are later in encoding order than the first picture and are encoded with referring to a picture that is earlier in encoding order than the first picture and the display delay correction information includes a value corresponding to the number of pictures occurring between a display time of a picture that is earliest in display order among the pictures that are later in encoding order than the first picture and a display time of the first picture; and
a video decoding apparatus for decoding the video data encoded by inter-frame predictive coding, including:
a picture time determining unit which, when the encoded video data contains information indicating that the encoded video data has been generated by splicing the encoded first video data to a trailing end of the second encoded video data, information indicating that one or more encoded pictures that have been discarded from the encoded video data and are later in encoding order than a starting encoded picture in the encoded first video data, the starting encoded picture being a picture immediately following a splicing point at which the second encoded video data and the encoded first video data are spliced, the decoding delay correction information and the display delay correction information, then corrects the display delay of the starting encoded picture based on the display delay correction information, while correcting, based on the decoding delay correction information, the decoding delay of the picture that follows the starting encoded picture.