Ambarella, Inc.

Hsiang-Chun Huang

Elliot N Linzer

ChiHong John Ju

An apparatus including a first circuit and a second circuit. The first circuit may be configured to transform an image block into a plurality of transform coefficients. The second circuit may be configured in each of a plurality of modes to (i) quantize the transform coefficients to calculate a plurality of quantized coefficients, (ii) translate a number of non-zero values of the quantized coefficients to a rate value, where the translation is a non-linear translation, (iii) calculate a distortion value (a) based on the transform coefficients and (b) independent of a plurality of inverse quantized coefficients corresponding to the quantized coefficients, and (iv) calculate a score of a current mode of the plurality of modes to encode the image block based on the rate value and the distortion value.

Low cost rate-distortion computations for video compression

A method of rate-distortion computations for video compression is disclosed. The method may include steps (A) to (C). Step (A) may generate a plurality of transform coefficients from a residual block of the video using a circuit. Step (B) may generate a block distortion value (i) based on the transform coefficients and (ii) independent of a plurality of inverse transform samples produced from the residual block. Step (C) may generate a rate-distortion value from the block distortion value.

A camera including a first queue, a second queue, and a processor. The processor is generally coupled to the first queue and the second queue. The processor embodies routines that, when executed by the processor, cause the processor to (i) record a first topology in the first queue and a second topology in the second queue and (ii) compare the first topology with the second topology. Recording of the second topology is generally started after the first topology is completely recorded. A focus of the camera is automatically adjusted based upon one or more similarities between the first topology and the second topology.

System for topology based automatic focus

A method for automatically focusing a camera including the steps of (A) recording a first topology and a second topology, where the second topology occurs temporally after the first topology, and (B) comparing the first topology with the second topology. A focus of the camera is automatically adjusted based upon one or more similarities between the first topology and the second topology.

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Sinpu Township, Hsinchu County, Taiwan

Hsiang-Chun Huang