IP Library › Granted Patent US 10,313,743

Granted Patent B2

US 10,313,743 · App. 15/373,509 · Granted Jun 4, 2019

Playback method and playback device

Inventors: Masayuki Kozuka (Osaka, JP); Tadamasa Toma (Osaka, JP); Kengo Terada (Osaka, JP); Takahiro Nishi (Nara, JP)

Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

H04N21/43635 H04N5/92 H04N7/015 H04N7/167 H04N21/4325 H04N21/4402 H04N21/4408 H04N21/440263 H04N21/835

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Quick Facts

Patent No.: US 10,313,743
App. No.: 15/373,509
Granted: Jun 4, 2019
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

A playback method according to one aspect of the present disclosure is performed by a playback device connected to a display device. The playback method includes obtaining a type of the display device; selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device; obtaining a video signal of content recorded on a recording medium; decoding the obtained video signal; encrypting the decoded video signal using the selected version of HDCP; and outputting the encrypted video signal to the display device using the selected version of HDMI.

Claims (206)

1. A method for a playback device that plays content, the method comprising:

obtaining a type of a display device connected to the playback device;

selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device;

obtaining a video signal of content recorded on a recording medium;

decoding the obtained video signal;

encrypting the decoded video signal using the selected version of HDCP; and

outputting the encrypted video signal to the display device using the selected version of HDMI,

wherein the type of the display device is one of:

a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range;

a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range;

a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and

a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range,

wherein the second resolution has a larger number of pixels than the first resolution,

wherein the second luminance range includes the first luminance range and has a higher peak luminance than the first luminance range,

wherein when the obtained type of the display device is the first type,

(i) in the selecting, each of HDMI 1.4 and HDCP 1.4 is selected,

(ii) in the encrypting, the decoded video signal is encrypted using HDCP 1.4, and

(iii) in the outputting, the encrypted video signal is output to the display device using a communication protocol that supports HDMI 1.4,

wherein the method further comprises:

obtaining a peak luminance of the display device connected to the playback device; and

when the obtained type of the display device is the first type and the obtained peak luminance is higher than a peak luminance of the first luminance range, converting the decoded video signal to a luminance range having the obtained peak luminance, and then further converting the decoded video signal to the first luminance range, and

wherein when the obtained type of the display device is the first type and the obtained peak luminance is higher than a peak luminance of the first luminance range,

(i) in the encrypting, the converted video signal is encrypted using HDCP 1.4, and

(ii) in the outputting, the encrypted video signal is output to the display device using a communication protocol that supports HDMI 1.4.

2. A method for a playback device that plays content, the method comprising:

obtaining a type of a display device connected to the playback device;

selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device;

obtaining a video signal of content recorded on a recording medium;

decoding the obtained video signal;

encrypting the decoded video signal using the selected version of HDCP; and

outputting the encrypted video signal to the display device using the selected version of HDMI,

wherein the type of the display device is one of:

a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range;

a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range;

a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and

a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range,

wherein the second resolution has a larger number of pixels than the first resolution,

wherein the second luminance range includes the first luminance range and has a higher peak luminance than the first luminance range,

wherein when the obtained type of the display device is the second type,

(i) in the selecting, each of HDMI 2.0 and HDCP 2.2 is selected,

(ii) in the encrypting, the decoded video signal is encrypted using HDCP 2.2, and

(iii) in the outputting, the encrypted video signal is output to the display device using a communication protocol that supports HDMI 2.0,

wherein the method further comprises:

obtaining a peak luminance of the display device connected to the playback device; and

when the obtained type of the display device is the second type and the obtained peak luminance is higher than a peak luminance of the first luminance range, converting the decoded video signal to a luminance range having the obtained peak luminance, and then further converting the video signal with the luminance range having the obtained peak luminance to the first luminance range, and

wherein when the obtained type of the display device is the second type and the obtained peak luminance is higher than a peak luminance of the first luminance range,

(i) in the encrypting, the converted video signal is encrypted using HDCP 2.2, and

(ii) in the outputting, the encrypted video signal is output to the display device using a communication protocol that supports HDMI 2.0.

3. A method for a playback device that plays content, the method comprising:

obtaining a type of a display device connected to the playback device;

selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device;

obtaining a video signal of content recorded on a recording medium;

decoding the obtained video signal;

encrypting the decoded video signal using the selected version of HDCP; and

outputting the encrypted video signal to the display device using the selected version of HDMI,

wherein the type of the display device is one of:

a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range;

a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range;

a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and

a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range,

wherein the second resolution has a larger number of pixels than the first resolution, and

wherein the second luminance range includes the first luminance range and has a higher peak luminance than the first luminance range,

wherein the recording medium records a plurality of video signals for playing a same content, at least one of a resolution and a luminance range differing between the plurality of video signals,

wherein in the obtaining of the video signal, one video signal is selected from among the plurality of video signals according to the obtained type of the display device, and the selected video signal is obtained from the recording medium,

wherein the recording medium records:

a first video signal including: a video stream whose resolution is the first resolution and whose luminance range is the first luminance range; and a graphics stream whose resolution is the first resolution and whose luminance range is the first luminance range; and

a second video signal including: a video stream whose resolution is the first resolution and whose luminance range is the second luminance range; and a graphics stream whose resolution is the first resolution and whose luminance range is the second luminance range,

wherein in the obtaining of the video signal, when a luminance range supported by the display device is the first luminance range, the first video signal including the video stream whose luminance range is in the first luminance range is selected, and when the luminance range supported by the display device is the second luminance range, the second video signal including the video stream whose luminance range is in the second luminance range is selected,

wherein (a) when the obtained type of the display device is the first type,

in the selecting, each of HDMI 1.4 and HDCP 1.4 is selected,

in the obtaining of the video signal, the first video signal is selected and the selected first video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained first video signal is decoded, and a first signal where the decoded video stream and the decoded graphics stream are combined together is generated,

in the encrypting, the first signal is encrypted using HDCP 1.4, and

in the outputting, the encrypted first signal is output to the display device using a communication protocol that supports HDMI 1.4,

wherein (b) when the obtained type of the display device is the second type,

in the selecting, each of HDMI 2.0 and HDCP 2.2 is selected,

in the obtaining of the video signal, the first video signal is selected and the selected first video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained first video signal is decoded, a second signal where the decoded video stream and the decoded graphics stream are combined together is generated, and the second signal where the decoded video stream and the decoded graphics stream are combined together is converted to the second resolution,

in the encrypting, the converted second signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted converted second signal is output to the display device using a communication protocol that supports HDMI 2.0,

wherein (c) when the obtained type of the display device is the third type,

in the selecting, each of HDMI 2.1 and HDCP 2.2 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained second video signal is decoded, and a third signal where the decoded video stream and the decoded graphics stream are combined together is generated,

in the encrypting, the third signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted third signal is output to the display device using a communication protocol that supports HDMI 2.1, and

wherein (d) when the obtained type of the display device is the fourth type,

in the selecting, each of HDMI 2.1 and HDCP 2.2 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained second video signal is decoded, a fourth signal where the decoded video stream and the decoded graphics stream are combined together is generated, and the fourth signal where the decoded video stream and the decoded graphics stream are combined together is converted to the second resolution as a converted second video signal,

in the encrypting, the converted fourth signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted converted fourth signal is output to the display device using a communication protocol that supports HDMI 2.1.

4. The playback method according to claim 3 , further comprising obtaining a peak luminance of the display device connected to the playback device,

wherein (e) when the obtained type of the display device is the first type and the obtained peak luminance is higher than the first peak luminance range,

in the selecting, each of HDMI 1.4 and HDCP 1.4 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained second video signal is decoded, a fifth signal where the decoded video stream and the decoded graphics stream are combined together is generated, and the fifth signal where the decoded video stream and the decoded graphics stream are combined together is converted to a luminance range having the obtained peak luminance, and then the fifth signal is further converted to the first luminance range and converted to the first resolution,

in the encrypting, the converted fifth signal is encrypted using HDCP 1.4, and

in the outputting, the encrypted converted fifth signal is output to the display device using a communication protocol that supports HDMI 1.4, and

wherein (f) when the obtained type of the display device is the second type and the obtained peak luminance is higher than the first peak luminance range,

in the selecting, each of HDMI 2.0 and HDCP 2.2 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained second video signal is decoded, a sixth signal where the decoded video stream and the decoded graphics stream are combined together is generated, and the sixth signal where the decoded video stream and the decoded graphics stream are combined together is converted to a luminance range having the obtained peak luminance, and then the sixth signal is further converted to the first luminance range,

in the encrypting, the converted sixth signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted converted sixth signal is output to the display device using a communication protocol that supports HDMI 2.0.

5. A method for a playback device that plays content, the method comprising:

obtaining a type of a display device connected to the playback device;

selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device;

obtaining a video signal of content recorded on a recording medium;

decoding the obtained video signal;

encrypting the decoded video signal using the selected version of HDCP; and

outputting the encrypted video signal to the display device using the selected version of HDMI,

wherein the type of the display device is one of:

a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range;

a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range;

a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and

a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range,

wherein the second resolution has a larger number of pixels than the first resolution, and

wherein the second luminance range includes the first luminance range and has a higher peak luminance than the first luminance range,

wherein the recording medium records a plurality of video signals for playing a same content, at least one of a resolution and a luminance range differing between the plurality of video signals,

wherein the recording medium records:

a first video signal including: a video stream whose resolution is the second resolution and whose luminance range is the first luminance range; and a graphics stream whose resolution is the first resolution and whose luminance range is the first luminance range; and

a second video signal including: a video stream whose resolution is the second resolution and whose luminance range is the second luminance range; and a graphics stream whose resolution is the first resolution and whose luminance range is the second luminance range,

wherein (a) when the obtained type of the display device is the first type,

in the selecting, each of HDMI 1.4 and HDCP 1.4 is selected,

in the obtaining of the video signal, the first video signal is selected and the selected first video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained first video signal is decoded, the decoded graphics stream is converted to the second resolution, a first signal where the decoded video stream and the converted graphics stream are combined together is generated, and the first signal where the converted video stream and the decoded graphics stream are combined together is converted to the first resolution,

in the encrypting, the converted first signal is encrypted using HDCP 1.4, and

in the outputting, encrypted first signal is output to the display device using a communication protocol that supports HDMI 1.4,

wherein (b) when the obtained type of the display device is the second type,

in the selecting, each of HDMI 2.0 and HDCP 2.2 is selected,

in the obtaining of the video signal, the first video signal is selected and the selected first video signal is obtained from the recording medium,

in the encrypting, the second signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted second signal is output to the display device using a communication protocol that supports HDMI 2.0,

wherein (c) when the obtained type of the display device is the third type,

in the selecting, each of HDMI 2.1 and HDCP 2.2 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the decoding, each of the video stream and graphics stream included in the obtained second video signal is decoded, the decoded graphics stream is converted to the second resolution, a third signal where the decoded video stream and the converted graphics stream are combined together is generated, and the third signal where the decoded video stream and the converted graphics stream are combined together is converted to the first resolution,

in the encrypting, the converted third signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted converted third signal is output to the display device using a communication protocol that supports HDMI 2.1, and

wherein (d) when the obtained type of the display device is the fourth type,

in the selecting, each of HDMI 2.1 and HDCP 2.2 is selected,

in the obtaining of the video signal, the second video signal is selected and the selected second video signal is obtained from the recording medium,

in the encrypting, the fourth signal is encrypted using HDCP 2.2, and

in the outputting, the encrypted fourth signal is output to the display device using a communication protocol that supports HDMI 2.1.

6. A method for a playback device that plays content, the method comprising:

obtaining a type of a display device connected to the playback device;

selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device;

obtaining a video signal of content recorded on a recording medium;

decoding the obtained video signal;

encrypting the decoded video signal using the selected version of HDCP; and

outputting the encrypted video signal to the display device using the selected version of HDMI,

wherein the type of the display device is one of:

a first type indicating a display device whose resolution is a first resolution and which supports a first luminance range;

a second type indicating a display device whose resolution is a second resolution and which supports the first luminance range;

a third type indicating a display device whose resolution is the first resolution and which supports a second luminance range; and

a fourth type indicating a display device whose resolution is the second resolution and which supports the second luminance range,

wherein the second resolution has a larger number of pixels than the first resolution, and

wherein the second luminance range includes the first luminance range and has a higher peak luminance than the first luminance range,

wherein the recording medium records a plurality of video signals for playing a same content, at least one of a resolution and a luminance range differing between the plurality of video signals,

wherein the recording medium records:

wherein (a) when the obtained type of the display device is the first type,

in the selecting, each of HDMI 1.4 and HDCP 1.4 is selected,

in the obtaining, the first video signal is selected and the selected first video signal is obtained from the recording medium,