# US 2018/0027293 A1 · Quality-of-experience optimization system, quality-of-experience optimization apparatus, recommend request apparatus, quality-of-experience optimization method, recommend request method, and program

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- Number: US 2018/0027293 A1
- Document ID: US20180027293A1
- Status: Published application
- Kind: A1
- Application number: 15/548,108
- Filed: 2015-12-24
- Published: 2018-01-25
- Earliest claimed: 2015-02-04
- Assignees: Nippon Telegraph and Telephone Corporation
- Applicants: Nippon Telegraph and Telephone Corporation
- Inventors: Hiroshi YAMAMOTO; Kazumichi SATO; Taichi KAWANO; Kei TAKESHITA
- Web page: https://patentgrep.com/patent/US20180027293A1

## CPC

- H04N 21/4621: {Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen (arrangements for using the results of monitoring on user's side in broadcast systems H04H60/65; flow control in packet networks H04L47/10)}
- G06F 13/00: Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units (interface circuits for specific input/output devices G06F3/00 {; multiprogram control therefor G06F9/46}; multiprocessor systems G06F15/16 )
- H04L 65/612: for unicast
- H04L 65/80: Responding to QoS
- H04N 21/2662: Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
- H04N 21/44209: {Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network (arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896)}
- H04N 21/472: End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content {(end-user interfaces for retrieving video data from a database G06F16/739; network services for supporting unicast streaming H04L65/612)}
- H04N 21/6379: directed to encoder {, e.g. for requesting a lower encoding rate}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A quality-of-experience optimization system configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, including: a recommend request apparatus configured to output a distribution parameter candidate of content distribution for optimizing QoE of content distribution, and to receive a distribution parameter for optimizing the QoE as a recommend value; and a quality-of-experience optimization apparatus configured to estimate QoE from the distribution parameter candidate received from the recommend request apparatus, and to calculate a distribution parameter for optimizing the QoE as a recommend value to output the recommend value.

## Claims

### Claim at position 1

1: A quality-of-experience optimization system configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, comprising:
a recommend request apparatus configured to output a distribution parameter candidate of content distribution for optimizing QoE of content distribution, and to receive a distribution parameter for optimizing the QoE as a recommend value; and
a quality-of-experience optimization apparatus configured to estimate QoE from the distribution parameter candidate received from the recommend request apparatus, and to calculate a distribution parameter for optimizing the QoE as a recommend value to output the recommend value.

### Claim at position 2

2: A quality-of-experience optimization apparatus configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, comprising:
a parameter input output unit configured to input a distribution parameter candidate for content distribution, and to output a recommend value for optimizing QoE; and
an estimation value·recommend value calculation unit configured to estimate QoE based on the distribution parameter candidate input by the parameter input output unit, and to calculate a distribution parameter for optimizing the QoE as the recommend value.

### Claim at position 3 (depends on 2)

3: The quality-of-experience optimization apparatus as claimed in claim 2, the estimation value·recommend value calculation unit including:
a QoE estimation function unit configured to calculate QoE from information on coding of the distribution parameter candidate;
a resolution·frame rate recommend function unit configured to calculate a resolution and a frame rate by which the QoE calculated by the QoE estimation unit becomes the largest; and
an initial coding parameter recommend function unit configured to calculate a coding parameter by which an average QoE of the whole of content distribution target users becomes the largest.

### Claim at position 4 (depends on 2)

4: The quality-of-experience optimization apparatus as claimed in claim 2, wherein the estimation value·recommend value calculation unit
estimates QoE based on a distribution parameter candidate input by the parameter input output unit and a setting value according to input data from a system administrator to calculate a distribution parameter that optimizes the QoE as the recommend value, and
the quality-of-experience optimization apparatus further includes a setting value update unit configured to update the setting value based on a distribution parameter candidate that is newly input by the parameter input output unit or new input data from the system administrator.

### Claim at position 5

5: A recommend request apparatus for optimizing QoE in a content distribution service, comprising:
a distribution parameter output unit configured to output a distribution parameter candidate for content distribution, to a quality-of-experience optimization apparatus, in order to request a distribution parameter for optimizing QoE as a recommend value; and
a recommend value reception unit configured to receive the recommend value from the quality-of-experience optimization apparatus.

### Claim at position 6

6: A quality-of-experience optimization method, executed by a quality-of-experience optimization apparatus, for optimizing QoE in a content distribution service, comprising:
a distribution parameter input step of inputting a distribution parameter candidate for content distribution;
an estimation value·recommend value calculation step of estimating QoE based on the distribution parameter candidate input in the parameter input step, and calculating a distribution parameter for optimizing the QoE as the recommend value; and
a recommend value output step of outputting the recommend value calculated in the estimation value·recommend value calculation step.

### Claim at position 7

7: A recommend request method executed by a recommend request apparatus for optimizing QoE in a content distribution service, comprising:
a distribution parameter output step of outputting a distribution parameter candidate for content distribution, to a quality-of-experience optimization apparatus, in order to request a distribution parameter for optimizing QoE as a recommend value; and
a recommend value reception step of receiving the recommend value from the quality-of-experience optimization apparatus.

### Claim at position 8 (depends on 2)

8: A non-transitory computer-readable recording medium storing a program that causes a computer to function as each unit in the quality-of-experience optimization apparatus as claimed in claim 2.

### Claim at position 9 (depends on 5)

9: A non-transitory computer-readable recording medium storing a program that causes a computer to function as each unit in the recommend request apparatus as claimed in claim 5.