CA2049692A1 - Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders - Google Patents

Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders

Info

Publication number
CA2049692A1
CA2049692A1 CA2049692A CA2049692A CA2049692A1 CA 2049692 A1 CA2049692 A1 CA 2049692A1 CA 2049692 A CA2049692 A CA 2049692A CA 2049692 A CA2049692 A CA 2049692A CA 2049692 A1 CA2049692 A1 CA 2049692A1
Authority
CA
Canada
Prior art keywords
video coder
coder
dynamic channel
channel
allocation unit
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.)
Granted
Application number
CA2049692A
Other languages
French (fr)
Other versions
CA2049692C (en
Inventor
Hsueh-Ming Hang
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2049692A1 publication Critical patent/CA2049692A1/en
Application granted granted Critical
Publication of CA2049692C publication Critical patent/CA2049692C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • 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
    • 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
    • H04N19/63—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
    • 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
    • H04N19/115—Selection of the code volume for a coding unit prior to coding
    • 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
    • H04N19/146—Data rate or code amount at the encoder output
    • 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
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability

Abstract

A dynamic channel allocation unit for specifying a bit rate for each video coder in a set of parallel video coders comprising an overall video coder is disclosed. The dynamic channel allocation unit is supplied from each individualvideo coder with an average frame quantization step size for the previous frame and the average number of bits produced per pel. For the current image frame the dynamic channel allocation unit computes a set of channel sharing factors, i.e., the percentage of the total channel bandwidth to be allocated to a particular video coder.
One channel sharing factor is computed for each individual video coder. Individual members of the set of channel sharing factors may be further refined to reflect the prior history of the channel sharing factor for their corresponding coder.
Additionally, the set of estimates may be normalized to reflect the actual number of bits that can actually be produced by each individual video coder.
CA002049692A 1990-09-09 1991-08-26 Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders Expired - Fee Related CA2049692C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/580,412 US5115309A (en) 1990-09-10 1990-09-10 Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders
US580,412 1990-09-10

Publications (2)

Publication Number Publication Date
CA2049692A1 true CA2049692A1 (en) 1992-03-10
CA2049692C CA2049692C (en) 1996-04-23

Family

ID=24321006

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049692A Expired - Fee Related CA2049692C (en) 1990-09-09 1991-08-26 Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders

Country Status (7)

Country Link
US (1) US5115309A (en)
EP (1) EP0479432B1 (en)
JP (1) JP2504880B2 (en)
KR (1) KR950004111B1 (en)
CA (1) CA2049692C (en)
DE (1) DE69118639T2 (en)
HK (1) HK146296A (en)

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