Digital processing amplifier

• US 6,392,713 B1
• Filed: 03/06/2000
• Issued: 05/21/2002
• Est. Priority Date: 03/06/2000
• Status: Expired due to Fees

• Current Assignee: Acoustic Technology LLC (Intellectual Ventures LLC)
• Original Assignee: Media 100, Inc.
• Inventors: Acker, David Edwin
• Primary Examiner(s): Kostak, Victor R.
• Application Number:
  US09/518,963
• Time in Patent Office: 806 Days
• Field of Search: 348/673, 348/703, 348/649-651, 348/659, 348/638, 348/639, 348/675, 348/453, 348/646
• US Class Current: 348/651
• CPC Class Codes: H04N 9/643 Hue control means, e.g. flesh tone control
• CPC Class Codes: H04N 9/68 for controlling the amplitude of colour signals, e.g. automatic chroma control circuits H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86

Abstract

A procamp to color transforms component digital video data. The procamp includes a digital multiplier coupled to receive component digital video data corresponding to at least two different pixel parameters. The digital multiplier is configured to selectively multiply the component video data for different pixel parameters by different factors.

Claims

1. A procamp to tranform component digital video data, comprising:

a first digital multiplier coupled to receive component digital video data corresponding to at least two different pixel parameters, and configured to selectively multiply the component video data for the different pixel parameters by different factors,

wherein the factors include two different gains,

wherein the component video data include color data, and further comprising;

a second digital multiplier coupled to receive the color data produced by the first multiplier and configured to produce first and second new color data by multiplying each color datum received from the first multiplier by the sine and cosine of an angle, respectively, the angle defining a hue rotation of the color data.

2. The procamp of claim 1, further comprising:

a multiplexer having input terminals coupled to sources of the different factors and an output terminal coupled to the first multiplier.

3. The procamp of claim 2, further comprising:

a controller coupled to cause the multiplexer to transmit first and second ones of the factors in synchronization with the component video data for first and second pixel parameters being received at the first multiplier.

4. The procamp of claim 3, wherein the factors include at least contrast and saturation gains.

5. The procamp of claim 3, further comprising:

a buffer coupled to receive the component digital video data and to transmit the received data to the first multiplier.

6. A procamp to transform component digital video data, comprising:

a first digital multiplier coupled to receive component digital video data corresponding to at least two different pixel parameters, and configured to selectively multiply the component video data for the different pixel parameters by different factors,

wherein the factors include contrast and color difference gains,

wherein the component video data include color data, and further comprising;

a second digital multiplier coupled to receive the color data produced by the first multiplier and configured to produce first and second new color data by multiplying each color datum received from the first multiplier by the sine and cosine of an angle, respectively, the angle defining a hue rotation of the color data.

7. The procamp of claim 6, further comprising:

an adder coupled to receive the new color data and to produce color data with a new hue by adding the first and second new color data.

8. A procamp to transform component digital video data, comprising:

a first digital multiplier coupled to receive component digital video data corresponding to at least two different pixel parameters, and configured to selectively multiply the component video data for the different pixel parameters by different factors,

wherein the factors include contrast and color difference gains, further comprising;

an adder to add a black-level offset to a first portion of the received component video data;

a second digital multiplier coupled to receive a second portion of the component video data produced by the first multiplier, said second portion comprising first and second color data, said second digital multiplier being configured to produce first and second new color data by multiplying the color datum received from the first multiplier by first and second hue factors, respectively; and

a separator coupled to receive the component video data from the first multiplier and to send said first portion from the first multiplier to the adder and to send said second portion received from the first multiplier to the second multiplier.

9. A method of transforming a sequence of component digital video data, comprising;

receiving the sequence of the component video data, the component video data of the sequence corresponding to at least two different pixel parameters;

sequentially transmitting the received data to a digital multiplier; and

multiplying each transmitted datum by a preselected factor in the multiplier, further comprising;

temporally interleaving the two different gains to the multiplier to perform the acts of multiplying further comprising;

sending a portion of the sequence from the first digital multiplier to a second digital multiplier; and

producing first and second data components from each datum of the portion by multiplying at the second digital multiplier to multiply each sent datum by first and second new digital factors, the new digital factors being a sine and a cosine of a hue rotation angle.

10. The method of claim 9, further comprising:

producing transformed digital color difference data by summing pairs of the produced data components.

11. A method of changing contrast and saturation levels of serially streaming component digital video data, comprising:

receiving a sequence of the component digital video data;

sequentially sending the component video data to a digital multiplier; and

multiplying the component video data by contrast and saturation gains in the digital multiplier, further comprising;

sending a portion of the data of the sequence from the first digital multiplier to a second digital multiplier; and

producing first and second digital data components from each datum of the portion by multiplying each sent datum by first and second new digital factors in the second multiplier, the new factors being a sine and a cosine of an angle.

12. The method of claim 11, further comprising:

producing transformed digital color difference data by summing pairs of the produced data components.