US 5,532,746 AGranted

Bit allocation method for controlling transmission rate of video encoder

AssigneeKorea Telecommunication Authority

InventorSung H. Chang

Life of this patent

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Abstract

A bit allocation method for controlling a transmission rate of a video encoder having an intra mode, a predicted mode and a bidirectionally predicted mode. If the intra mode is selected, it is checked whether a scene change indicating signal is outputted. If the scene change indicating signal is not outputted, a bit amount corresponding to the intra mode is allocated to video data and the video data is coded in the intra mode. If the scene change indicating signal is outputted, a bit amount corresponding to the predicted mode is allocated to the video data, the scene change indicating signal is initialized and the video data is coded in the predicted mode. If a scene change is not present in the case where the predicted mode is selected, the bit amount corresponding to the predicted mode is allocated to the video data and the video data is coded in the predicted mode. If the scene change is present in the predicted mode, the scene change indicating signal is outputted, a bit amount approximate to that corresponding to the intra mode is allocated to the video data and the video data is coded in the predicted mode. In the case where the bidirectionally predicted mode is selected, a bit amount corresponding to the bidirectionally predicted mode is allocated to the video data and the data is coded in the bidirectionally predicted mode.

Claims2

Dependent claims

A bit allocation method for controlling a transmission rate of a video encoder having an intra mode, a predicted mode and a bidirectionally predicted mode, comprising the steps of:

selecting one of the intra mode, the predicted mode and the bidirectionally predicted mode;
checking whether a scene change is present, if the predicted mode is selected, allocating a bit amount corresponding to the predicted mode to the video data if it is checked that the scene change is not present, coding the video data in the predicted mode, outputting a scene change indicating signal if it is checked that the scene change is present, allocating a bit amount approximate to that corresponding to the intra mode to the video data and coding the video data in the predicted mode;
checking whether a scene change indicating signal is outputted, if the intra mode is selected, allocating a bit amount corresponding to the intra mode to video data if it is checked that the scene change indicating signal is not outputted, coding the video data in the intra mode, allocating a bit amount corresponding to the predicted mode to the video data if it is checked that the scene change indicating signal is outputted, initializing the scene change indicating signal and coding the video data in the predicted mode;
and
allocating a bit amount corresponding to the bidirectionally predicted mode to the video data if the bidirectionally predicted mode is selected and coding the video data in the bidirectionally predicted mode.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/336,807Filed 9 Nov 1994
Priority: KR 93-238519 Nov 1993
Granted: 2 Jul 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

C21D 8/1205
During manufacturing of articles with special electromagnetic properties: involving particular fabrication steps or treatments of ingots or slabs
C22C 38/02
Ferrous alloys, e.g. steel alloys: containing silicon
H04N 19/103
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: selection of coding mode or of prediction mode
H04N 19/114
Selection of coding mode or of prediction mode: adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames