Method and device for controlling quantization scales of a video encoding bit stream
AssigneeMediatek Inc.
InventorChih-Hui Kuo
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Abstract
According to the exemplary embodiment of the present invention, a method for controlling quantization scales when encoding video signals is disclosed, which comprises: (a) generating a new quantization scale; and (b) comparing the new quantization scale with a prior quantization scale, and if the difference between the new quantization scale and the prior quantization scale exceeds a predetermined range, replace the prior quantization scale with the new quantization scale.
Claims6
A method for controlling quantization scales when encoding video signals, comprising:
- (a) generating a new quantization scale;
- and
- (b) comparing the new quantization scale with a prior quantization scale, and if the difference between the new quantization scale and the prior quantization scale exceeds a predetermined range, replace the prior quantization scale with the new quantization scale.
A video quantizing device for quantizing video signals to generate a quantized matrix comprising:
- a rate controller for providing quantization scales;
- and
- a quantizer electrically connected to the rate controller for quantizing the video signals according to the quantization scales;
- wherein the rate controller compares a new quantization scale with the prior quantization scale, and if the difference between the new quantization scale and the prior quantization scale exceeds a predetermined range, the rate controller provides the new quantization scale to the quantizer to replace the prior quantization scale.
A method for encoding digital video signals, the digital video signals including a plurality of macro blocks, the method comprising:
- (a) encoding a current macro block using a first quantization scale;
- and
- (b) determining whether to encode a next macro block using a second quantization scale instead of the first quantization scale according to a difference between the first quantization scale and the second quantization scale.
An apparatus for encoding digital video signals, the digital video signals including a plurality of macro blocks, the apparatus comprising:
- a rate controller for providing a quantization scale;
- and
- a quantizer coupled for receiving the quantization scale to perform quantization to respective one of the macro blocks;
- wherein when the new value is significantly different from a prior value, the quantization scale provided by the quantizer is replaced with the new value.
Dependencies are inferred from the claim text.