CA2612122C - Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile - Google Patents

Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile Download PDF

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Publication number
CA2612122C
CA2612122C CA 2612122 CA2612122A CA2612122C CA 2612122 C CA2612122 C CA 2612122C CA 2612122 CA2612122 CA 2612122 CA 2612122 A CA2612122 A CA 2612122A CA 2612122 C CA2612122 C CA 2612122C
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CA
Canada
Prior art keywords
frame rate
frames
data stream
decoding
processor
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.)
Active
Application number
CA 2612122
Other languages
English (en)
Other versions
CA2612122A1 (fr
Inventor
David Mak-Fan
Aaron B. Small
Thomas C. Nagy
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.)
BlackBerry Ltd
Original Assignee
BlackBerry 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 BlackBerry Ltd filed Critical BlackBerry Ltd
Priority to CA 2612122 priority Critical patent/CA2612122C/fr
Publication of CA2612122A1 publication Critical patent/CA2612122A1/fr
Application granted granted Critical
Publication of CA2612122C publication Critical patent/CA2612122C/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2662Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102Methods 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
    • H04N19/132Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/44Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/587Methods 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808Management of client data

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Graphics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un processeur et une méthode sont fournis pour décoder un fichier multimédia avec des flux de données audio et vidéo qui sont configurés pour être joués en synchronisation. Des trames de flux vidéo sont décodées et jouées avec laudio et, pour compenser la saturation dutilisation du processeur, deux procédures sont réalisées. La première procédure fonctionne à un premier intervalle périodique et ralentit le taux de trames pour réduire lutilisation du processeur sil y a lieu. La seconde procédure essaie premièrement daccélérer la vidéo pour rattraper laudio si elles ne sont pas synchronisées et si cela ne peut être fait lors du prochain intervalle de temps, le décodage dun nombre sélectionné de trames est sauté de sorte que les flux de données audio et vidéo sont synchronisés de nouveau.
CA 2612122 2007-11-23 2007-11-23 Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile Active CA2612122C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2612122 CA2612122C (fr) 2007-11-23 2007-11-23 Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2612122 CA2612122C (fr) 2007-11-23 2007-11-23 Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile

Publications (2)

Publication Number Publication Date
CA2612122A1 CA2612122A1 (fr) 2009-05-23
CA2612122C true CA2612122C (fr) 2015-03-24

Family

ID=40652837

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2612122 Active CA2612122C (fr) 2007-11-23 2007-11-23 Systeme et methode d'obtention d'une frequence d'images completes variable et de saut de trame adaptatif sur appareil mobile

Country Status (1)

Country Link
CA (1) CA2612122C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114510140B (zh) * 2020-11-16 2024-04-16 深圳市万普拉斯科技有限公司 一种调频方法、装置及电子设备
CN114143411A (zh) * 2021-11-26 2022-03-04 天津光电通信技术有限公司 一种基于fpga的气象传真数字接收系统

Also Published As

Publication number Publication date
CA2612122A1 (fr) 2009-05-23

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