US 11,729,519 B2
Video signal processing apparatus, video signal processing method, and image-capturing apparatus
Koji Kamiya, Kanagawa (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Filed by SONY GROUP CORPORATION, Tokyo (JP)
Filed on Jun. 17, 2022, as Appl. No. 17/842,918.
Application 17/842,918 is a continuation of application No. 16/969,469, granted, now 11,394,942, previously published as PCT/JP2019/003806, filed on Feb. 4, 2019.
Claims priority of application No. 2018-037906 (JP), filed on Mar. 2, 2018.
Prior Publication US 2022/0311983 A1, Sep. 29, 2022
Int. Cl. H04N 23/88 (2023.01); H04N 9/64 (2023.01); H04N 9/69 (2023.01)
CPC H04N 23/88 (2023.01) [H04N 9/646 (2013.01); H04N 9/69 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A video signal processing apparatus, comprising:
a first processing circuit that includes a tone controller configured to impart tone curve characteristics for tone adjustment to an input video signal having linear characteristics, wherein the tone controller is configured to generate the tone curve characteristics for tone adjustment using setting information; and
a second processing circuit that includes a first curve characteristics imparting circuit configured to impart, to the video signal processed by the first processing circuit, first curve characteristics for output, and generate a first output video signal, wherein the second processing circuit further includes a second curve characteristics imparting circuit configured to impart, to the video signal processed by the first processing circuit, second curve characteristics for output, and generate a second output video signal,
wherein the first curve characteristics for output are particular characteristics selected from a group including curve characteristics for optical-electro transfer function (OETF) conversion and curve characteristics for display gamma processing, and the second curve characteristics for output are another selected from the group other than the particular characteristics, and
the setting information includes one of (1) a parameter that defines a center of a range of a level of an input signal to which the tone curve characteristics are imparted, (2) a parameter that defines the range of the level of the input signal to which the tone curve characteristics are imparted, (3) a parameter that defines a curved shape of the tone curve characteristics, and (4) a parameter that defines an amount of variation in a level of an output signal at the center of the range of the level of the input signal to which the tone curve characteristics are imparted.