VIDEO ENCODING APPARATUS AND METHOD FOR CONTROLLING THE SAME

• US 20120155555A1
• Filed: 10/31/2011
• Published: 06/21/2012
• Est. Priority Date: 12/15/2010
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: SHIN, Kyoung Seon, EUM, Nak Woong
• Application Number:
  US13/285,036
• Publication Number:
  US 20120155555A1
• Time in Patent Office: Days
• US Class Current: 375/240.26
• CPC Class Codes: H04N 19/102 characterised by the element, parameter or selection affected or controlled by the adaptive coding
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/42 characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation H04N19/635 takes precedence
• CPC Class Codes: H04N 19/587 involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression

Abstract

A video encoding apparatus includes: a video preprocessor configured to receive video data; a video encoder configured to encode an output signal of the video preprocessor; a host controller configured to control operations of the video preprocessor and the video encoder; and an operating mode controlling circuit configured to output an encoding control signal to the video encoder to change a preprocessing operation once receiving a control parameter and an operation command from the host controller during the operation of the video encoder.

Claims

1. A video encoding apparatus comprising:

a video preprocessor configured to receive video data;

a video encoder configured to encode an output signal of the video preprocessor;

a host controller configured to control operations of the video preprocessor and the video encoder; and

an operating mode controlling circuit configured to output an encoding control signal to the video encoder to change a preprocessing operation once receiving a control parameter and an operation command from the host controller during the operation of the video encoder.

2. The video encoding apparatus of claim 1, wherein the operating mode controlling circuit outputs an encoding control signal according to the control parameter and the operation command to the video encoder in synchronization with a vertical sync signal.

3. The video encoding apparatus of claim 2, wherein in the operating mode controlling circuit, the maximum delay time until the encoding control signal is outputted after the control parameter and the operation command are received is a time corresponding to one frame interval.

4. The video encoding apparatus of claim 3, wherein the operating mode controlling circuit performs one of Instantaneous Decoder Refresh (IDR) middle insertion, a Group Of Pictures (GOP) period change, a Quantization Parameter (QP) change, and a change of parameter for frame unit encode control in the video encoder.

5. The video encoding apparatus of claim 2, wherein the operating mode controlling circuit outputs a preprocessing control signal according to the control parameter and the operation command to the vide preprocessor in synchronization with a vertical sync signal.

6. The video encoding apparatus of claim 5, wherein in the operating mode controlling circuit, the maximum delay time until outputting the preprocessing control signal to the video preprocessor and outputting a corresponding encoding control signal to an encoder after receiving the control parameter and the operation command is a time corresponding to two frame intervals.

7. The video encoding apparatus of claim 6, wherein a resolution or a frame rate is changed in the video preprocessor and the video encoder by the operating mode controlling circuit.

8. A method of controlling video encoding, the method comprising:

receiving by an operating mode controlling circuit a control parameter and an operation command from a host controller;

outputting by the operating mode controlling circuit an encoding control signal according to the control parameter and the operation command in synchronization with a vertical sync signal; and

encoding by a video encoder a signal outputted from a video preprocessor according to the encoding control signal.